@inbook{545732,
author={Raymond S. Greenberg and Stephen R. Daniels and W. Dana Flanders and John William Eley and John R. Boring III},
title={Chapter 7. Clinical Trials},
booktitle={Medical Epidemiology, 4e},
publisher={The McGraw-Hill Companies},
address={New York, NY},
year={2005},
url={accessmedicine.mhmedical.com/content.aspx?aid=545732}
}