ClinicalTrials.gov hosts a large collection of clinical studies from around the world. You can search for clinical studies by condition or disease name or other terms such as a drug name. Note: ClinicalTrials.gov is an official website of the U.S. Department of Health and Human Services, National Institutes of Health, National Library of Medicine, and National Center for Biotechnology Information. The National Library of Medicine (NLM) maintains this website.