561 matching studies

Sponsor Condition of Interest
Testing the Use of Fulvestrant and Binimetinib Targeted Treatment for NF1 Mutation in Hormone Receptor-Positive...
National Cancer Institute (NCI) Anatomic Stage IV Breast Cancer AJCC v8 Metastatic HER2-Negative Breast Carcinoma Metastatic Hormone Receptor-Positive Breast Carcinoma
This phase II ComboMATCH treatment trial compares the usual treatment alone (fulvestrant) to using binimetinib plus the usual treatment in patients with hormone receptor positive breast cancer that has spread from where it first started to other places in the body (metastatic) and has an NF1 genetic... expand

This phase II ComboMATCH treatment trial compares the usual treatment alone (fulvestrant) to using binimetinib plus the usual treatment in patients with hormone receptor positive breast cancer that has spread from where it first started to other places in the body (metastatic) and has an NF1 genetic change. Fulvestrant is a hormonal therapy that binds to estrogen receptors in tumor cells, resulting in estrogen receptor destruction and decreased estrogen binding, which may inhibit the growth of estrogen-sensitive tumor cells. Binimetinib is a targeted therapy that may stop the growth of tumor cells by blocking some of the enzymes needed for cell growth. The addition of binimetinib to fulvestrant in breast cancers with an NF1 genetic change could increase the percentage of tumors that shrink as well as lengthen the time that the tumors remain stable (without progression) as compared to fulvestrant alone.

Type: Interventional

Start Date: Sep 2024

open study

A Study of Cabozantinib as a Maintenance Agent to Prevent Progression or Recurrence in High-Risk Pediatric...
Nationwide Children's Hospital Neuroblastoma Sarcoma
This study will expand the types of pediatric cancers being evaluated for response to cabozantinib. The current COG study is restricted to Ewing sarcoma, osteosarcoma, rhabdomyosarcoma, Wilms tumor, and a handful of uncommon tumors. The proposed study will extend this evaluation to tumors that have... expand

This study will expand the types of pediatric cancers being evaluated for response to cabozantinib. The current COG study is restricted to Ewing sarcoma, osteosarcoma, rhabdomyosarcoma, Wilms tumor, and a handful of uncommon tumors. The proposed study will extend this evaluation to tumors that have been shown to either express known targets of cabozantinib or with preclinical evidence of efficacy, including specifically neuroblastomas. These tumors have high morbidity and mortality, particularly in the relapse setting, and few or no proven therapeutic options. As such, evaluation of cabozantinib in these studies is warranted. The study hypothesizes that use of cabozantinib in patients with ultra-high-risk pediatric solid tumors with minimal disease burden, as defined in the inclusion criteria below, can prevent and/or slow recurrent tumor formation in pediatric solid tumors and thereby significantly extend the period of disease control and/or induce a durable cure.

Type: Interventional

Start Date: Jul 2022

open study

Olorofim Aspergillus Infection Study
F2G Biotech GmbH Invasive Aspergillosis
The purpose of this study is to compare treatment with olorofim versus treatment with AmBisome® followed by standard of care (SOC) in patients with IFD caused by proven IA or probable lower respiratory tract disease Aspergillus species (invasive aspergillosis, IA). expand

The purpose of this study is to compare treatment with olorofim versus treatment with AmBisome® followed by standard of care (SOC) in patients with IFD caused by proven IA or probable lower respiratory tract disease Aspergillus species (invasive aspergillosis, IA).

Type: Interventional

Start Date: Mar 2022

open study

INSPIRE Pipeline™ Shield Post Approval Study
Medtronic Neurovascular Clinical Affairs Intracranial Aneurysm
The purpose of the Pipeline™ Flex Embolization Device with Shield Technology™ Post Approval Study (PAS) ("Pipeline™ Shield PAS") is to collect on-label use data in patients undergoing treatment for intracranial aneurysms (IA) using the Pipeline™ Flex Embolization Device with Shield Technology™ ("Pipeline™... expand

The purpose of the Pipeline™ Flex Embolization Device with Shield Technology™ Post Approval Study (PAS) ("Pipeline™ Shield PAS") is to collect on-label use data in patients undergoing treatment for intracranial aneurysms (IA) using the Pipeline™ Flex Embolization Device with Shield Technology™ ("Pipeline™ Shield Device") in a real-world post approval setting within the United States.

Type: Observational [Patient Registry]

Start Date: Dec 2021

open study

Topical Antibiotic Therapy to Reduce Infection After Operative Treatment of Fractures At High Risk of...
Major Extremity Trauma Research Consortium Post Operative Surgical Site Infection
The overall objective is to compare the effect of Vancomycin and Tobramycin powder combined (treatment) to Vancomycin powder (control) in the reduction of post-fixation infections of tibial plateau and tibial pilon fractures at high risk of infection (collectively considered the "study injuries"). expand

The overall objective is to compare the effect of Vancomycin and Tobramycin powder combined (treatment) to Vancomycin powder (control) in the reduction of post-fixation infections of tibial plateau and tibial pilon fractures at high risk of infection (collectively considered the "study injuries").

Type: Interventional

Start Date: May 2021

open study

Safety and Efficacy Study of Meningococcal Group B Vaccine rMenB+OMV NZ (Bexsero) to Prevent Gonococcal...
National Institute of Allergy and Infectious Diseases (NIAID) Gonococcal Infection
This is a Phase II, randomized, observer-blind, placebo-controlled, multi-site trial of the FDA licensed rMenB+OMV NZ vaccine, Bexsero. The targeted study population is men and women 18-50 years of age who are disproportionately vulnerable to N. gonorrhoeae infection. Approximately 2,200 participants... expand

This is a Phase II, randomized, observer-blind, placebo-controlled, multi-site trial of the FDA licensed rMenB+OMV NZ vaccine, Bexsero. The targeted study population is men and women 18-50 years of age who are disproportionately vulnerable to N. gonorrhoeae infection. Approximately 2,200 participants are expected to be enrolled to achieve at least 202 evaluable participants. Data will be collected in an observer-blind manner. Study product recipients and study staff responsible for the evaluation of any study endpoint will be unaware of whether Bexsero or placebo were administered. The duration of the study for participants who are enrolled and randomized will be approximately 16 months. Study participation is expected to be completed in approximately 36 months. The primary objective of the study is to demonstrate efficacy of Bexsero in prevention of urogenital and/or anorectal gonococcal infection.

Type: Interventional

Start Date: Dec 2020

open study

Rare CFTR Mutation Cell Collection Protocol (RARE)
George Solomon Cystic Fibrosis
Over 1,900 mutations in the gene for the cystic fibrosis transmembrane conductance regulator (CFTR) protein are implicated in causing Cystic Fibrosis (CF). Potential therapies that directly target defective CFTR are being evaluated in important clinical trials, but most target the most common CFTR... expand

Over 1,900 mutations in the gene for the cystic fibrosis transmembrane conductance regulator (CFTR) protein are implicated in causing Cystic Fibrosis (CF). Potential therapies that directly target defective CFTR are being evaluated in important clinical trials, but most target the most common CFTR mutation F508del. Many patients with rare CF mutations are not able to participate in those studies. The RARE study is specifically designed for people with CF caused by rare mutations. Eligible rare mutations are listed below: • CF patients who are heterozygous for pre-mature stop codons as noted below: i. one allele must be a F508del ii. the other allele must be a pre-mature stop codon mutation • CF Patients with other genotypes that require Study PI permission: i. CF patients with two mutations that are not eligible for Trikafta ii. CF patients homozygous or heterozygous (other allele must be F508del) for rare mutations of special interest (e.g., 711+3A->G, 2789+5G->A, 3272-26A->G, 3849+10kbC->T). Other rare mutations will be considered on a case by case basis This is a multi-site, specimen collection study. Investigators will collect blood, intestinal cells and nasal cells from each participant. Cells from these specimens will be used to test future CFTR modulators to see if they might work for people with study eligible rare mutations. Having cells to test in the lab is an important first step in identifying potential new therapies for people with these mutations.

Type: Observational

Start Date: Oct 2017

open study

A Phase II/III Trial of Nivolumab, Ipilimumab, and GM-CSF in Patients With Advanced Melanoma
National Cancer Institute (NCI) Stage III Cutaneous Melanoma AJCC v7 Stage IV Cutaneous Melanoma AJCC v6 and v7
This phase II/III trial studies the side effects of nivolumab and ipilimumab when given together with or without sargramostim and to see how well they work in treating patients with stage III-IV melanoma that cannot be removed by surgery (unresectable) and that may have spread from where it first... expand

This phase II/III trial studies the side effects of nivolumab and ipilimumab when given together with or without sargramostim and to see how well they work in treating patients with stage III-IV melanoma that cannot be removed by surgery (unresectable) and that may have spread from where it first started to nearby tissue, lymph nodes, or distant parts of the body (advanced). Immunotherapy with monoclonal antibodies, such as ipilimumab and nivolumab, may help the body's immune system attack the cancer, and may interfere with the ability of tumor cells to grow and spread. Colony-stimulating factors, such as sargramostim, may increase the production of white blood cells. It is not yet known whether nivolumab and ipilimumab are more effective with or without sargramostim in treating patients with melanoma.

Type: Interventional

Start Date: Nov 2015

open study

Evaluation of Free Gingival Graft Timing
University of Alabama at Birmingham Ridge Augmentation Alveolar Mucosa
This clinical trial aims to compare and evaluate the clinical outcomes between two distinct treatment sequences: free gingival graft surgery preceding guided bone regeneration and guided bone regeneration followed by free gingival graft. expand

This clinical trial aims to compare and evaluate the clinical outcomes between two distinct treatment sequences: free gingival graft surgery preceding guided bone regeneration and guided bone regeneration followed by free gingival graft.

Type: Interventional

Start Date: Aug 2024

open study

Developing and Evaluating a Novel Approach to Improve HPV Vaccination Coverage Among High-risk, Under-immunized...
University of Alabama at Birmingham Human Papilloma Virus
To determine if the emergency department (ED) setting offers a viable space for improving HPV vaccination coverage among 18 to 45-year-old adults who have not yet received human papilloma virus (HPV) vaccination or who did not complete the vaccine series. This study will develop, pilot and evaluate... expand

To determine if the emergency department (ED) setting offers a viable space for improving HPV vaccination coverage among 18 to 45-year-old adults who have not yet received human papilloma virus (HPV) vaccination or who did not complete the vaccine series. This study will develop, pilot and evaluate an ED-based HPV vaccination protocol and program for ED patients aged 18-26 (for whom catch-up HPV vaccination is routinely recommended by the CDC) and separately for patients aged 27-45 (for whom it may be recommended under shared decision making, SDM).

Type: Observational

Start Date: Aug 2024

open study

Enlighten Study: The EV-ICD Post Approval Registry
Medtronic Ventricular Arrhythmia Tachycardia
Medtronic is sponsoring Enlighten: The EV-ICD Post Approval Registry, to further confirm safety and effectiveness of EV-ICD in routine clinical practice, following commercial release of EV-ICD devices. expand

Medtronic is sponsoring Enlighten: The EV-ICD Post Approval Registry, to further confirm safety and effectiveness of EV-ICD in routine clinical practice, following commercial release of EV-ICD devices.

Type: Observational

Start Date: Sep 2023

open study

High-Intensity Exercise to Combat Vascular and Cognitive Dysfunction in Adults with HIV
University of Alabama at Birmingham HIV Arterial Stiffness Cognitive Dysfunction
This is a single site, randomized exercise trial with individuals at least 50 years of age living with HIV who experience suboptimal cognition. The overall goals of this proposal are to determine whether 16 weeks of structured high-intensity interval training (HIIT) can overcome vascular and cognitive... expand

This is a single site, randomized exercise trial with individuals at least 50 years of age living with HIV who experience suboptimal cognition. The overall goals of this proposal are to determine whether 16 weeks of structured high-intensity interval training (HIIT) can overcome vascular and cognitive impairments (Aim 1) to a greater extent than continuous moderate exercise. Additionally, investigator will seek to identify barriers to engagement in exercise and the participants' perceptions of the study and exercise interventions (Aim 2). This study will enroll 60 participants in Birmingham, Alabama. Data collection will occur at each visit, with baseline data collected at the initial visit with a 3-month follow-up occurring following completion of the intervention.

Type: Interventional

Start Date: Feb 2024

open study

Testing Pump Chemotherapy in Addition to Standard of Care Chemotherapy Versus Standard of Care Chemotherapy...
ECOG-ACRIN Cancer Research Group Metastatic Colorectal Carcinoma Metastatic Malignant Neoplasm in the Liver Stage IV Colorectal Cancer AJCC v8 Unresectable Colorectal Carcinoma
This phase III trial compares hepatic arterial infusion (HAI) (pump chemotherapy) in addition to standard of care chemotherapy versus standard of care chemotherapy alone in treating patients with colorectal cancer that has spread to the liver (liver metastases) and cannot be removed by surgery (unresectable).... expand

This phase III trial compares hepatic arterial infusion (HAI) (pump chemotherapy) in addition to standard of care chemotherapy versus standard of care chemotherapy alone in treating patients with colorectal cancer that has spread to the liver (liver metastases) and cannot be removed by surgery (unresectable). HAI uses a catheter to carry a tumor-killing chemotherapy drug called floxuridine directly into the liver. HAI is already approved by the Food and Drug Administration (FDA) for use in metastatic colorectal cancer to the liver, but it is only available at a small number of hospitals, and most of the time it is not used until standard chemotherapy stops working. Standard chemotherapy drugs work in different ways to stop the growth of tumor cells, either by killing the cells, by stopping them from dividing, or by stopping them from spreading. Adding HAI to standard chemotherapy may be effective in shrinking or stabilizing unresectable colorectal liver metastases.

Type: Interventional

Start Date: Oct 2023

open study

A Study of GC012F, a CAR T Therapy Targeting CD19 and BCMA in Subjects With Relapsed/Refractory Multiple...
Gracell Biopharmaceuticals, Inc. Relapsed/ Refractory Multiple Myeloma
This trial is a phase 1b/2, open-label, multicenter study of GC012F, a CD19/BCMA dual CART-cell therapy, in adult subjects with relapsed/refractory Multiple Myeloma. expand

This trial is a phase 1b/2, open-label, multicenter study of GC012F, a CD19/BCMA dual CART-cell therapy, in adult subjects with relapsed/refractory Multiple Myeloma.

Type: Interventional

Start Date: Jul 2023

open study

Standardizing Treatments for Pulmonary Exacerbations - Aminoglycoside Study
Chris Goss Cystic Fibrosis Cystic Fibrosis Pulmonary Exacerbation
The purpose of this study is to look at pulmonary exacerbations in people with cystic fibrosis (CF) that need to be treated with antibiotics given through a tube inserted into a vein (intravenous or IV). A pulmonary exacerbation is a worsening of respiratory symptoms in people with CF that needs medical... expand

The purpose of this study is to look at pulmonary exacerbations in people with cystic fibrosis (CF) that need to be treated with antibiotics given through a tube inserted into a vein (intravenous or IV). A pulmonary exacerbation is a worsening of respiratory symptoms in people with CF that needs medical intervention. Both doctors and CF patients are trying to understand the best way to treat pulmonary exacerbations. This study is trying to answer the following questions about treating a pulmonary exacerbation: - Do participants have the same improvement in lung function and symptoms if they are treated with one type of antibiotic (called beta-lactams or β-lactams) versus taking two different types of antibiotics (tobramycin and β-lactams)? - Is taking one type of antibiotic just as good as taking two types?

Type: Interventional

Start Date: Apr 2023

open study

A Study of TAK-500 With or Without Pembrolizumab in Adults With Select Locally Advanced or Metastatic...
Takeda Pancreatic Cancer Hepatocellular Cancer Mesothelioma Breast Cancer Gastric Cancer
This study is about TAK-500, given either alone or with pembrolizumab, in adults with select locally advanced or metastatic solid tumors. The aims of the study are: - to assess the safety profile of TAK-500 when given alone and when given with pembrolizumab. - to assess the anti-tumor... expand

This study is about TAK-500, given either alone or with pembrolizumab, in adults with select locally advanced or metastatic solid tumors. The aims of the study are: - to assess the safety profile of TAK-500 when given alone and when given with pembrolizumab. - to assess the anti-tumor effects of TAK-500, when given alone and when given with pembrolizumab, in adults with locally advanced or metastatic solid tumors. Participants may receive TAK-500 for up to 1 year. Participants may continue with their treatment if they have continuing benefit and if this is approved by their study doctor. Participants who are receiving TAK-500 either alone or with pembrolizumab will continue with their treatment until their disease progresses or until they or their study doctor decide they should stop this treatment.

Type: Interventional

Start Date: Apr 2022

open study

Catheter-Related Early Thromboprophylaxis With Enoxaparin Studies
Yale University Deep Venous Thrombosis
The goal of the CRETE Studies is to investigate the newly identified age-dependent heterogeneity in the efficacy of enoxaparin in reducing the risk of central venous catheter-associated deep venous thrombosis in critically ill children. expand

The goal of the CRETE Studies is to investigate the newly identified age-dependent heterogeneity in the efficacy of enoxaparin in reducing the risk of central venous catheter-associated deep venous thrombosis in critically ill children.

Type: Interventional

Start Date: May 2022

open study

Biologic Abatement and Capturing Kids' Outcomes and Flare Frequency in Juvenile Spondyloarthritis
Children's Hospital of Philadelphia Juvenile Spondyloarthritis
This randomized pragmatic trial will generate knowledge about strategies used to de-escalate tumor necrosis factor inhibitor (TNFi) therapy in patients with juvenile spondyloarthritis with sustained inactive disease and are treated at one of the 29 participating pediatric healthcare systems. This... expand

This randomized pragmatic trial will generate knowledge about strategies used to de-escalate tumor necrosis factor inhibitor (TNFi) therapy in patients with juvenile spondyloarthritis with sustained inactive disease and are treated at one of the 29 participating pediatric healthcare systems. This open label study will be conducted in the setting of routine clinical care and will compare the risk and timing of flare (Aim 1) and patients' lived experiences (Aim 2) across three arms.

Type: Interventional

Start Date: Nov 2021

open study

A Study Evaluating Different Doses of BI 765049 When Given Alone and When Given With Ezabenlimab to Patients...
Boehringer Ingelheim Colorectal Neoplasms, Carcinoma, Non-Small-Cell Lung, Pancreatic Neoplasms, Carcinoma, Hepatocellular, Head and Neck Neoplasms, Gastrointestinal Neoplasms
This study is open to adults with advanced solid tumors whose previous cancer treatment was not successful. People can participate if their tumor has the B7-H6 marker or if they have colorectal cancer. The study tests 2 medicines called BI 765049 and ezabenlimab (BI 754091). Both medicines may... expand

This study is open to adults with advanced solid tumors whose previous cancer treatment was not successful. People can participate if their tumor has the B7-H6 marker or if they have colorectal cancer. The study tests 2 medicines called BI 765049 and ezabenlimab (BI 754091). Both medicines may help the immune system fight cancer. The purpose of this study is to find out the highest dose of BI 765049 alone and in combination with ezabenlimab the participants can tolerate. In this study, BI 765049 is given to people for the first time. Participants can stay in the study for up to 3 years, if they benefit from treatment and can tolerate it. During this time, they get BI 765049 alone or in combination with ezabenlimab as infusion into a vein every 3 weeks. The doctors check the health of the participants and note any health problems that could have been caused by BI 765049 or ezabenlimab. The doctors also regularly monitor the size of the tumor.

Type: Interventional

Start Date: May 2021

open study

Rollover Study for Patients With Sickle Cell Disease Who Have Completed a Prior Novartis-Sponsored Crizanlizumab...
Novartis Pharmaceuticals Sickle Cell Disease
This is a multi-center multi-national rollover study to allow continued access to crizanlizumab for patients with sickle cell disease (SCD) who are on crizanlizumab treatment in a Novartis-sponsored study (parent study) and are benefiting from the treatment as judged by the investigator. expand

This is a multi-center multi-national rollover study to allow continued access to crizanlizumab for patients with sickle cell disease (SCD) who are on crizanlizumab treatment in a Novartis-sponsored study (parent study) and are benefiting from the treatment as judged by the investigator.

Type: Interventional

Start Date: Jun 2021

open study

A Study of ART0380 for the Treatment of Advanced or Metastatic Solid Tumors
Artios Pharma Ltd Advanced Cancer Metastatic Cancer Ovarian Cancer Primary Peritoneal Cancer Fallopian Tube Cancer
This clinical trial is evaluating a drug called ART0380 in participants with advanced or metastatic solid tumors. The main goals of this study are to: - Find the recommended dose of ART0380 that can be given safely to participants alone and in combination with gemcitabine or irinotecan... expand

This clinical trial is evaluating a drug called ART0380 in participants with advanced or metastatic solid tumors. The main goals of this study are to: - Find the recommended dose of ART0380 that can be given safely to participants alone and in combination with gemcitabine or irinotecan - Learn more about the side effects of ART0380 alone and in combination with gemcitabine or irinotecan - Learn more about the effectiveness of ART0380 alone and in combination with gemcitabine or irinotecan

Type: Interventional

Start Date: Dec 2020

open study

Virtual Reality-Base Intelligent Orientation and Mobility Specialists Trial
University of Alabama at Birmingham Low Vision, Both Eyes
The human subject research is a randomized, controlled training trial that tests the effectiveness of three Virtual Reality-based Intelligent Orientation and Mobility Specialists (VR-IOMSs) in teaching orientation and mobility (O&M) task skills to low vision patients. It will be conducted on two sites,... expand

The human subject research is a randomized, controlled training trial that tests the effectiveness of three Virtual Reality-based Intelligent Orientation and Mobility Specialists (VR-IOMSs) in teaching orientation and mobility (O&M) task skills to low vision patients. It will be conducted on two sites, University of Alabama at Birmingham (UAB) and Alabama Institute for Deaf and Blind (AIDB). The same protocol will be used on both sites. UAB will be the sIRB for the trial. Three O&M tasks will be studied, timing to cross a signalized street using the near lane parallel traffic surge skill, timing to cross an uncontrolled street using the traffic gap judgment skill and learning outdoor numbering system. A VR-IOMS will be develop for each task. The training does not involve research subjects walking into street traffic. Low vision subjects who have difficulties with these O&M tasks due to their impaired vision will be randomized into three groups, learning the task from a VR-IOMS (experimental group), from a human Certified Orientation & Mobility Specialist (COMS) in real streets (active control group) and not learning the task but spending the same amount of time watching low vision education videos (placebo group). All subjects will be evaluated by COMSs in real streets around the two study sites before training (pre-training), within 3 days after the completion of training (post-training) and 3 months after the completion of training (follow up). Their ability to perform the O&M tasks will be assess quantitatively using objective methods. COMSs who conduct these evaluations will be blinded for subject training assignment. The primary outcome measure is the training effect, the difference in task performance between the pre-training and post-training real street evaluations. The training effects of the 3 groups will be compared to determine the training effectiveness of the VR-IOMS relative to human COMS. Secondary outcome measures include the retainment of the training effect. Objective assessment of the VR-IOMS training process and trainee subjective evaluation of the VR-IOMS training will also be analyzed.

Type: Interventional

Start Date: Aug 2023

open study

The ExTINGUISH Trial of Inebilizumab in NMDAR Encephalitis
University of Utah Autoimmune Encephalitis Encephalitis
Determine the difference in the modified Rankin score at 16 weeks in participants with anti-N-methyl-D-aspartate receptor (NMDAR) encephalitis treated with "first-line" immunomodulatory therapies provided as standard-of-care, and either inebilizumab (investigational agent) or placebo. expand

Determine the difference in the modified Rankin score at 16 weeks in participants with anti-N-methyl-D-aspartate receptor (NMDAR) encephalitis treated with "first-line" immunomodulatory therapies provided as standard-of-care, and either inebilizumab (investigational agent) or placebo.

Type: Interventional

Start Date: Mar 2022

open study

NTX-301 in MDS/AML
University of Alabama at Birmingham Acute Myeloid Leukemia Myelodysplastic Syndromes Chronic Myelomonocytic Leukemia
NTX-301 is a DNMT1 inhibitor. The drug is an oral drug with preclinical data that has shown preclinical anti-leukemic efficacy. This is the first clinical trial using NTX-301 in patients with myeloid malignancies. expand

NTX-301 is a DNMT1 inhibitor. The drug is an oral drug with preclinical data that has shown preclinical anti-leukemic efficacy. This is the first clinical trial using NTX-301 in patients with myeloid malignancies.

Type: Interventional

Start Date: Jan 2021

open study

The Biosonographic Index
University of Alabama at Birmingham Acute Kidney Injury
In this exploratory study we explore the use of Shear Wave Elastography to differentiate between Acute Kidney Injury after vascular surgery and among the healthy population. expand

In this exploratory study we explore the use of Shear Wave Elastography to differentiate between Acute Kidney Injury after vascular surgery and among the healthy population.

Type: Interventional

Start Date: Jan 2020

open study