Clinical trials are research studies that test how well new medical approaches work in people.

The National Cancer Institute (NCI) supports a vast array of clinical trials designed to test new ways to treat, prevent, detect, or diagnose cancer as well as new methods to improve cancer patients' quality of life. NCI-supported clinical trials take place either intramurally at the National Institutes of Health (NIH) Clinical Center in Bethesda, Maryland, or extramurally at any of the hundreds of academic or private hospitals, cancer centers, or community-based medical practices located in the United States, Puerto Rico, Canada, and Europe that receive NCI funding.

Transcripts available at: http:www.nih4health.videotranscripts.nih.govnciwhatis.html.