555 matching studies

Sponsor Condition of Interest
A Study to Evaluate BMS-986470 in Healthy Volunteers and Participants With Sickle Cell Disease
Bristol-Myers Squibb Anemia, Sickle Cell Healthy Volunteers
The purpose of this study is to evaluate the safety and tolerability, pharmacokinetics and pharmacodynamics, pH and food effect, and preliminary efficacy of BMS-986470 in healthy volunteers and participants with sickle cell disease. expand

The purpose of this study is to evaluate the safety and tolerability, pharmacokinetics and pharmacodynamics, pH and food effect, and preliminary efficacy of BMS-986470 in healthy volunteers and participants with sickle cell disease.

Type: Interventional

Start Date: Jul 2024

open study

Comparing Rituximab and Mosunetuzumab Drug Treatments for People With Low Tumor Burden Follicular L1
National Cancer Institute (NCI) Classic Follicular Lymphoma Follicular Lymphoma With Unusual Cytological Features
This phase III trial compares the effectiveness of rituximab to mosunetuzumab in treating patients with follicular lymphoma with a low tumor burden. Rituximab is a monoclonal antibody. It binds to a protein called CD20, which is found on B cells (a type of white blood cell) and some types of cancer1 expand

This phase III trial compares the effectiveness of rituximab to mosunetuzumab in treating patients with follicular lymphoma with a low tumor burden. Rituximab is a monoclonal antibody. It binds to a protein called CD20, which is found on B cells (a type of white blood cell) and some types of cancer cells. This may help the immune system kill cancer cells. Mosunetuzumab is a monoclonal antibody that may interfere with the ability of cancer cells to grow and spread. It is not yet known if giving rituximab or mosunetuzumab works better in treating patients with follicular lymphoma with a low tumor burden.

Type: Interventional

Start Date: Oct 2024

open study

Gut Oxalate Absorption in Calcium Oxalate Stone Disease
University of Alabama at Birmingham Kidney Stone Kidney Calculi Urolithiasis Urolithiasis, Calcium Oxalate Nephrolithiasis
The goal of this clinical trial study is to test if patients with idiopathic calcium oxalate kidney stones have an increased absorption of dietary oxalate, which would lead to increased urinary excretion of oxalate. The study will recruit adult patients with a history of calcium oxalate kidney sto1 expand

The goal of this clinical trial study is to test if patients with idiopathic calcium oxalate kidney stones have an increased absorption of dietary oxalate, which would lead to increased urinary excretion of oxalate. The study will recruit adult patients with a history of calcium oxalate kidney stones and healthy volunteers without kidney stones. Participants will - ingest fixed diets containing low and moderately high amounts of oxalate for 5 days at a time - ingest a soluble form of oxalate and sugar preparations to test gut permeability - collect urine, blood, stool and breath sample during the fixed diets and the soluble oxalate test

Type: Interventional

Start Date: Apr 2024

open study

O. Formigenes Colonization in Calcium Oxalate Kidney Stone Disease
University of Alabama at Birmingham Kidney Stone Kidney Calculi Urolithiasis Urolithiasis, Calcium Oxalate Nephrolithiasis
The goal of this trial is to test if colonization with the gut bacteria Oxalobacter formigenes leads to a reduction in urinary oxalate excretion in patients with calcium oxalate kidney stone disease. The study will recruit adult participants with a history of calcium oxalate kidney stones who are1 expand

The goal of this trial is to test if colonization with the gut bacteria Oxalobacter formigenes leads to a reduction in urinary oxalate excretion in patients with calcium oxalate kidney stone disease. The study will recruit adult participants with a history of calcium oxalate kidney stones who are not colonized with Oxalobacter formigenes. Participants will - ingest fixed diets containing low and moderately high amounts of oxalate for 4 days at a time - collect urine, blood and stool samples during the fixed diets - ingest a preparation of live Oxalobacter formigenes to induce colonization with Oxalobacter formigenes

Type: Interventional

Start Date: Apr 2024

open study

Seladelpar in Subjects With Primary Biliary Cholangitis (PBC) and Compensated Cirrhosis
Gilead Sciences Primary Biliary Cholangitis
To Evaluate the Effect of Seladelpar on Clinical Outcomes in Patients with Primary Biliary Cholangitis (PBC) and Compensated Cirrhosis. expand

To Evaluate the Effect of Seladelpar on Clinical Outcomes in Patients with Primary Biliary Cholangitis (PBC) and Compensated Cirrhosis.

Type: Interventional

Start Date: Sep 2023

open study

Treatment With Endovascular Intervention for STroke Patients With Existing Disability
University of Cincinnati Stroke Stroke, Acute Stroke, Ischemic
TESTED will compare the risks and benefits of endovascular thrombectomy (EVT) to medical management (no EVT) in ischemic stroke patients who have a blockage in one of the large blood vessels in the brain and have a moderate-to-severe disability prior to their stroke. expand

TESTED will compare the risks and benefits of endovascular thrombectomy (EVT) to medical management (no EVT) in ischemic stroke patients who have a blockage in one of the large blood vessels in the brain and have a moderate-to-severe disability prior to their stroke.

Type: Observational

Start Date: Nov 2023

open study

Study of Lumateperone as Adjunctive Therapy in the Treatment of Patients With Major Depressive Diso1
Intra-Cellular Therapies, Inc. Major Depressive Disorder
This is a multicenter, randomized, double-blind, placebo-controlled parallel-group, fixed-dose study in patients with a primary diagnosis of MDD according to criteria of the Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition (DSM-5) who have an inadequate response to ongoing ADT. expand

This is a multicenter, randomized, double-blind, placebo-controlled parallel-group, fixed-dose study in patients with a primary diagnosis of MDD according to criteria of the Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition (DSM-5) who have an inadequate response to ongoing ADT.

Type: Interventional

Start Date: May 2023

open study

Testing the Addition of High Dose, Targeted Radiation to the Usual Treatment for Locally-Advanced I1
NRG Oncology Locally Advanced Lung Non-Small Cell Carcinoma Stage IIB Lung Cancer AJCC v8 Stage III Lung Cancer AJCC v8
This phase III trial compares the effect of adding stereotactic body radiation therapy (SBRT) to the usual treatment (conventional image guided radiation therapy [IGRT] and chemotherapy followed by immunotherapy with durvalumab or targeted therapy with osimertinib) versus the usual treatment alone1 expand

This phase III trial compares the effect of adding stereotactic body radiation therapy (SBRT) to the usual treatment (conventional image guided radiation therapy [IGRT] and chemotherapy followed by immunotherapy with durvalumab or targeted therapy with osimertinib) versus the usual treatment alone in treating patients with non-small cell lung cancer that has spread to nearby tissue or lymph nodes (locally advanced) and cannot be treated by surgery (inoperable). SBRT uses special equipment to position a patient and deliver radiation therapy to tumors with high precision. This method may kill tumor cells with fewer doses over a shorter period and cause less damage to normal tissue. IGRT is a type of radiation therapy that creates a picture of the tumor to help guide the radiation beam during therapy, making it more accurate and causing less damage to healthy tissue. Usual chemotherapy used in this trial consists of combinations of the following drugs: cisplatin, carboplatin, paclitaxel, nab-paclitaxel, pemetrexed, and etoposide. Cisplatin and carboplatin are in a class of medications known as platinum-containing compounds. Cisplatin works by killing, stopping, or slowing the growth of tumor cells. Carboplatin works in a way similar to the anticancer drug cisplatin but may be better tolerated than cisplatin. Carboplatin works by killing, stopping, or slowing the growth of tumor cells as well. Paclitaxel is in a class of medications called antimicrotubule agents. It works by stopping the growth and spread of tumor cells. Nab-paclitaxel is an albumin-stabilized nanoparticle formulation of paclitaxel which may have fewer side effects and work better than other forms of paclitaxel. Pemetrexed is in a class of medications called antifolate antineoplastic agents. It works by blocking the action of a certain substance in the body that may help tumor cells multiply. Etoposide is in a class of medications known as podophyllotoxin derivatives. It blocks a certain enzyme needed for cell division and deoxyribonucleic acid (DNA) repair and may kill tumor cells. Immunotherapy with durvalumab can induce changes in the body's immune system and can interfere with the ability of tumor cells to grow and spread. Osimertinib is in a class of medications called kinase inhibitors. It works by blocking the action of a protein called EGFR that signals cancer cells to multiply. This helps slow or stop the spread of tumor cells. Adding SBRT to the usual treatment of IGRT with chemotherapy and immunotherapy may be more effective at treating patients with locally-advanced non-small cell lung cancer than giving the usual treatment alone.

Type: Interventional

Start Date: Jul 2023

open study

Testing New Therapies for Patients With Acute Myeloid Leukemia Who Are Newly Diagnosed and Have Not1
National Cancer Institute (NCI) Acute Myeloid Leukemia Acute Myeloid Leukemia Arising From Previous Myelodysplastic/Myeloproliferative Neoplasm Acute Myeloid Leukemia Post Cytotoxic Therapy Acute Myeloid Leukemia, Myelodysplasia-Related
This phase II MyeloMATCH treatment trial tests whether the standard approach of cytarabine and daunorubicin in comparison to the following experimental regimens works to shrink cancer in patients with high risk acute myeloid leukemia (AML): 1) daunorubicin and cytarabine liposome alone; 2) cytarabi1 expand

This phase II MyeloMATCH treatment trial tests whether the standard approach of cytarabine and daunorubicin in comparison to the following experimental regimens works to shrink cancer in patients with high risk acute myeloid leukemia (AML): 1) daunorubicin and cytarabine liposome alone; 2) cytarabine and daunorubicin with venetoclax; 3) azacitidine and venetoclax; 4) daunorubicin and cytarabine liposome and venetoclax. "High-risk" refers to traits that have been known to make the AML harder to treat. Cytarabine is in a class of medications called antimetabolites. It works by slowing or stopping the growth of cancer cells in the body. Daunorubicin is in a class of medications called anthracyclines. It also works by slowing or stopping the growth of cancer cells in the body. Azacitidine is in a class of medications called demethylation agents. It works by helping the bone marrow to produce normal blood cells and by killing abnormal cells. Venetoclax is in a class of medications called B-cell lymphoma-2 (BCL-2) inhibitors. It may stop the growth of cancer cells by blocking Bcl-2, a protein needed for cancer cell survival. There is evidence that these newer experimental treatment regimens may work better in getting rid of more AML compared to the standard approach of cytarabine and daunorubicin.

Type: Interventional

Start Date: Sep 2024

open study

LEGEND Study: EG-70 in NMIBC Patients BCG-Unresponsive and High-Risk NMIBC Incompletely Treated Wit1
enGene, Inc. Superficial Bladder Cancer Non-muscle Invasive Bladder Cancer With Carcinoma in Situ Non-muscle Invasive Bladder Cancer
This study will evaluate the safety and efficacy of intravesical administration of detalimogene (EG-70) in the bladder and its effect on bladder tumors in patients with NMIBC. This study study consists of two phases; a Phase 1 dose-escalation to establish safety and recommended the phase 2 dose, f1 expand

This study will evaluate the safety and efficacy of intravesical administration of detalimogene (EG-70) in the bladder and its effect on bladder tumors in patients with NMIBC. This study study consists of two phases; a Phase 1 dose-escalation to establish safety and recommended the phase 2 dose, followed by a Phase 2 study to establish how effective the treatment is. The Study will include patients with: NMIBC with CIS for whom BCG therapy is unresponsive, and other high risk patients with NMIBC. A Substudy will include a surfactant bladder rinse prior to the instillation of detalimogene in patients with NMIBC with CIS for whom BCG therapy is unresponsive.

Type: Interventional

Start Date: Apr 2021

open study

Monitoring HER2+ Breast Cancer Neoadjuvant Treatment With Advanced PET/MRI
University of Alabama at Birmingham HER2-positive Breast Cancer
The purpose of the study is to see if using an investigational drug called [18F]FMISO with PET/MRI imaging can help monitor and predict the effect of trastuzumab (Herceptin) on chemotherapy in patients diagnosed with advanced HER2 positive breast cancer. This study is for imaging purposes only and1 expand

The purpose of the study is to see if using an investigational drug called [18F]FMISO with PET/MRI imaging can help monitor and predict the effect of trastuzumab (Herceptin) on chemotherapy in patients diagnosed with advanced HER2 positive breast cancer. This study is for imaging purposes only and is not a treatment study. The results of this study will not change a patient's clinical treatment plan but it may help physicians and researchers better understand how best to treat patients with breast cancer in the future.

Type: Interventional

Start Date: Mar 2022

open study

A Study to Compare Two Surgical Procedures in Individuals With BRCA1 Mutations to Assess Reduced Ri1
NRG Oncology Ovarian Carcinoma
This clinical trial evaluates how well two surgical procedures (bilateral salpingectomy and bilateral salpingo-oophorectomy) work in reducing the risk of ovarian cancer for individuals with BRCA1 mutations. Bilateral salpingectomy involves the surgical removal of fallopian tubes, and bilateral salp1 expand

This clinical trial evaluates how well two surgical procedures (bilateral salpingectomy and bilateral salpingo-oophorectomy) work in reducing the risk of ovarian cancer for individuals with BRCA1 mutations. Bilateral salpingectomy involves the surgical removal of fallopian tubes, and bilateral salpingo-oophorectomy involves the surgical removal of both the fallopian tubes and ovaries. This study may help doctors determine if the two surgical procedures are nearly the same for ovarian cancer risk reduction for women with BRCA1 mutations.

Type: Interventional

Start Date: Sep 2020

open study

HSV G207 in Children With Recurrent or Refractory Cerebellar Brain Tumors
M.D. Anderson Cancer Center Neoplasms, Brain Glioblastoma Multiforme Glioblastoma of Cerebellum Neoplasms Astrocytoma
This study is a clinical trial to determine the safety of inoculating G207 (an experimental virus therapy) into a recurrent or refractory cerebellar brain tumor. The safety of combining G207 with a single low dose of radiation, designed to enhance virus replication, tumor cell killing, and an anti-1 expand

This study is a clinical trial to determine the safety of inoculating G207 (an experimental virus therapy) into a recurrent or refractory cerebellar brain tumor. The safety of combining G207 with a single low dose of radiation, designed to enhance virus replication, tumor cell killing, and an anti-tumor immune response, will also be tested. Funding Source- FDA OOPD

Type: Interventional

Start Date: Sep 2019

open study

Transcatheter Mitral Valve Replacement With the Medtronic Intrepid™ TMVR System in Patients With Se1
Medtronic Cardiovascular Mitral Valve Regurgitation
Multi-center, global, prospective, non-randomized, interventional, pre-market trial. All subjects enrolled with receive the study device. expand

Multi-center, global, prospective, non-randomized, interventional, pre-market trial. All subjects enrolled with receive the study device.

Type: Interventional

Start Date: Oct 2017

open study

Continued Pressure for Alveolar Protection (CPAP Trial)
NICHD Neonatal Research Network Bronchopulmonary Dysplasia (BPD)
The objective of the CPAP Trial is to test whether extending CPAP until 34 weeks' PMA or for at least 2 additional weeks compared to weaning to a nasal canula will decrease the likelihood of bronchopulmonary dysplasia or death at 36 weeks' PMA. expand

The objective of the CPAP Trial is to test whether extending CPAP until 34 weeks' PMA or for at least 2 additional weeks compared to weaning to a nasal canula will decrease the likelihood of bronchopulmonary dysplasia or death at 36 weeks' PMA.

Type: Interventional

Start Date: Nov 2026

open study

A Study of Buntanetap in Participants With PD
Annovis Bio Inc. Parkinson's Disease (PD) Deep Brain Stimulation
This study will examine the long-term safety of buntanetap in participants with PD. This will be a 36-month open-label safety study. This study will be conducted with two cohorts. Cohort 1 will enroll via invitation only for PD participants who have previously participated in buntanetap clinical tr1 expand

This study will examine the long-term safety of buntanetap in participants with PD. This will be a 36-month open-label safety study. This study will be conducted with two cohorts. Cohort 1 will enroll via invitation only for PD participants who have previously participated in buntanetap clinical trials. Cohort 2 will be for PD participants who are receiving deep brain stimulation (DBS) treatment. Qualified participants will receive buntanetap 30mg QD after a screening period of up to 42 days.

Type: Interventional

Start Date: Jan 2026

open study

TLN-372 in Advanced KRAS Mutant Solid Tumors
Treeline Biosciences, Inc. KRAS Mutant Solid Tumors
The primary purpose of this study is to evaluate the safety, pharmacokinetics, and anti-tumor activity of TLN-372 as a single agent and in combination with other anti-tumor agents, in patients with advanced KRAS mutant solid tumors expand

The primary purpose of this study is to evaluate the safety, pharmacokinetics, and anti-tumor activity of TLN-372 as a single agent and in combination with other anti-tumor agents, in patients with advanced KRAS mutant solid tumors

Type: Interventional

Start Date: Sep 2025

open study

A Study to Evaluate the Use of Resmetirom in Participants With MASLD and HIV
Naga P. Chalasani MASLD - Metabolic Dysfunction-Associated Steatotic Liver Disease HIV (Human Immunodeficiency Virus)
The purpose of this research study is to test the safety and effectiveness of the study drug, resmetirom, in participants with MASLD and HIV. This is a research study to test a drug that is already on the market with a population that was not included in the original clinical trials. Participants w1 expand

The purpose of this research study is to test the safety and effectiveness of the study drug, resmetirom, in participants with MASLD and HIV. This is a research study to test a drug that is already on the market with a population that was not included in the original clinical trials. Participants will be people over age 18 with HIV who are on antiretroviral therapy and have been diagnosed with MASLD. Researchers will compare resmetirom to placebo (a look-alike substance that contains no drug) to see if resmetirom decreases the amount of fat in the liver. Participants will: - Complete 3 screening visits to determine eligibility. - Take resmetirom or placebo every day for 24 weeks if eligible. - Have 2 MRI scans to measure the amount of fat on the liver. One will be before treatment starts and one will be at the end of 24 weeks of treatment. - Attend 3 scheduled clinic visits while on treatment for bloodwork and safety assessments. - Participate in 3 phone calls while on treatment and one phone call 4 weeks after treatment is completed to check for safety and any health changes.

Type: Interventional

Start Date: Apr 2026

open study

Induction of Cross-protective Antibodies for Serogroup 33 by Pneumococcal Conjugate Vaccines
University of Alabama at Birmingham Vaccine Pneumococcal Disease
The goal of this study is to learn whether different types of vaccines to prevent bacterial infections are able to effectively create antibodies that defend against certain types of bacteria. We will give two different types of vaccine and evaluate the effectiveness of antibodies produced by each1 expand

The goal of this study is to learn whether different types of vaccines to prevent bacterial infections are able to effectively create antibodies that defend against certain types of bacteria. We will give two different types of vaccine and evaluate the effectiveness of antibodies produced by each vaccine in killing bacteria.

Type: Interventional

Start Date: Jul 2026

open study

Clinical Study to Evaluate the Safety and Effectiveness of Arcevo LSA
Artivion Inc. Aortic Arch Aneurysm Aortic Arch Dissection Chronic Aortic Dissection Acute Aortic Dissection
The goal of this clinical trial is to learn if the Arcevo LSA stent graft can safely and effectively treat patients that have an acute or chronic aortic dissection and/or aneurysm that involves the aortic arch and the descending thoracic aorta, with or without the involvement of the ascending aorta. expand

The goal of this clinical trial is to learn if the Arcevo LSA stent graft can safely and effectively treat patients that have an acute or chronic aortic dissection and/or aneurysm that involves the aortic arch and the descending thoracic aorta, with or without the involvement of the ascending aorta.

Type: Interventional

Start Date: Nov 2025

open study

Pilot Trial for WounDx™ Clinical Decision Support Tool
Henry M. Jackson Foundation for the Advancement of Military Medicine Wounds Wounds and Injuries Extremity Injury Traumatic Wounds and Injuries Amputation, Traumatic/Surgery
The purpose of this research is to evaluate the overall use of the WounDx medical device in a clinical setting, such as a hospital. The WounDx device is experimental and not yet approved by the United States Food and Drug Administration (FDA). WounDx uses information about a patient's wound to gene1 expand

The purpose of this research is to evaluate the overall use of the WounDx medical device in a clinical setting, such as a hospital. The WounDx device is experimental and not yet approved by the United States Food and Drug Administration (FDA). WounDx uses information about a patient's wound to generate a report that a surgeon may use to help determine when to close or not close the wound. The final decision to close the wound remains with the surgeon. The results from this pilot trial will inform a larger pivotal trial.

Type: Interventional

Start Date: May 2026

open study

A Study to Evaluate the Safety and Efficacy of Ruxolitinib Cream in Pediatric Participants With Non1
Incyte Corporation NonSegmental Vitiligo
The purpose of this study is to to evaluate the safety and efficacy of ruxolitinib cream in pediatric participants with nonsegmental vitiligo. expand

The purpose of this study is to to evaluate the safety and efficacy of ruxolitinib cream in pediatric participants with nonsegmental vitiligo.

Type: Interventional

Start Date: Jan 2025

open study

Zelquistinel or Placebo for the Reduction of Symptoms of Major Depressive Disorder
Syndeio Biosciences, Inc Major Depressive Disorder
The goal of this clinical trial is to learn if zelquistinel works to treat depression in adults. It will also learn about the safety of zelquistinel. The main questions it aims to answer are: Does zelquistinel reduce depression scores in participants compared to participants who take a placebo (a1 expand

The goal of this clinical trial is to learn if zelquistinel works to treat depression in adults. It will also learn about the safety of zelquistinel. The main questions it aims to answer are: Does zelquistinel reduce depression scores in participants compared to participants who take a placebo (a look-alike tablet that contains no zelquistinel)? What medical problems are observed in participants who take zelquistinel? Participants will take one tablet of zelquistinel or placebo every week for 6 weeks. Participants will visit the clinic every week of the 6 week period to have the severity of their depression evaluated.

Type: Interventional

Start Date: Feb 2025

open study

Denosumab for Type 1 Diabetes
City of Hope Medical Center Type 1 Diabetes
Type 1 diabetes (T1D) arises from abnormal immune cell-mediated injury to beta cells that make insulin. The injured beta cells can then no longer make the needed amount of insulin to stay healthy. However, in the early stages of T1D, some beta cells are still alive and functioning. Treatment to pro1 expand

Type 1 diabetes (T1D) arises from abnormal immune cell-mediated injury to beta cells that make insulin. The injured beta cells can then no longer make the needed amount of insulin to stay healthy. However, in the early stages of T1D, some beta cells are still alive and functioning. Treatment to protect the beta cells against injury at this time could slow the progress of disease. Denosumab is an approved treatment for osteoporosis (a disease that thins and weakens the bones), high blood calcium levels, bone cancer, and other bone problems in patients who have cancer. The research team has found that the bone pathway that denosumab works on to treat these bone conditions also has effects on the health of the beta cells. Lab studies suggest that denosumab may protect and/or increase the number of beta cells and improve how well they work. This study will test whether denosumab is safe and improves beta cell function and blood sugar control in people with early T1D.

Type: Interventional

Start Date: Sep 2024

open study

Comprehensive HHT Outcomes Registry of the United States (CHORUS)
Cure HHT Hereditary Hemorrhagic Telangiectasia Arteriovenous Malformations Telangiectasia Epistaxis GastroIntestinal Bleeding
The Comprehensive HHT Outcomes Registry of the United States (CHORUS) is an observational registry of patients diagnosed with Hereditary Hemorrhagic Telangiectasia (HHT). The purpose of this study is to better understand HHT, the symptoms and complications it causes, and the impact the disease has1 expand

The Comprehensive HHT Outcomes Registry of the United States (CHORUS) is an observational registry of patients diagnosed with Hereditary Hemorrhagic Telangiectasia (HHT). The purpose of this study is to better understand HHT, the symptoms and complications it causes, and the impact the disease has on people's lives. The investigators will collect long-term information about the participant, allowing us to understand how the disease changes over time, and what factors can influence those changes. Ultimately, this should help improve treatments for the disease. Another important goal of the study is to provide a way to contact people to participate in future clinical trials and other research. The registry will be a centralized resource for recruitment for clinical trials. People in the registry will not be obligated to join any of these additional studies, but if interested, can agree to be contacted if they may be eligible for a study. Participants will: - Be asked to provide permission to collect information from their medical records, including things like demographic information, diagnosis information, family history, test results, treatment information, symptoms, complications, lifestyle and other relevant medical information. - Be asked study-related questions by phone or at a clinic visit. - Be asked study-related questions every year after enrollment for up to 10 years or until the study ends. A member of the study team will communicate with participants by phone or at clinic visits to collect information regarding any changes to their health over the previous year/s including new test results, treatment information, symptoms, and complications from HHT.

Type: Observational [Patient Registry]

Start Date: Nov 2023

open study