@inbook{1186212195,
author={Leslie G. Portney},
title={Principles of Clinical Trials},
booktitle={Foundations of Clinical Research: Applications to Evidence-Based Practice, 4e},
publisher={F. A. Davis Company},
address={New York, NY},
year={2020},
url={fadavispt.mhmedical.com/content.aspx?aid=1186212195}
}