ClinicalTrials.com is a comprehensive resource for trusted information about medical research studies, also called clinical trials. Hosted by Pharmaceutical Product Development. Inc.. http://www.clinicaltrials.com/
The PLoS Hub for Clinical Trials collects PLoS journal articles that relate to clinical trials. The Hub is a site for researchers to share their views and build a dynamic, interactive community. http://clinicaltrials.ploshubs.org/home.action
The global source of news, directories, proprietary market research, and analysis for clinical trials professionals and patients. http://www.centerwatch.com/