What Are Clinical Trials and Studies? - National Institute on Aging
https://www.nia.nih.gov/health/clinical-trials-and-studies/what-are-clinical-trials-and-studies
WebClinical trials are research studies that test a medical, surgical, or behavioral intervention in people. These trials are the primary way that researchers determine if a new form of treatment or prevention, such as a new drug, diet, or medical device (for example, a pacemaker), is safe and effective in people.
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