Phases of a Cancer Clinical Trial, with Nicholas Petrelli, MD


Dr. Nicholas Petrelli explains how clinical cancer research is done in distinct segments, called the phases of a clinical trial.

More Information

Clinical Trials

If you are having trouble watching videos, you may need to download and install the latest version of Adobe Flash Player. To see additional videos, visit and subscribe to Cancer.Net's YouTube channel.

Last Updated: January 21, 2014