@inbook{57836005,
author={Gail E. Hafley and Sergio Leonardi and Karen S. Pieper},
editor={Lopes, Renato D. and Harrington, Robert A.},
title={Chapter 8. Phase III and IV Clinical Trials},
booktitle={Understanding Clinical Research},
publisher={The McGraw-Hill Companies},
address={New York, NY},
year={2013},
url={accessmedicine.mhmedical.com/content.aspx?aid=57836005}
}