@inbook{1108590235, author={Valerie L. Durkalski-Mauldin and Kathleen T. Brady}, editor={Greenberg, Raymond S.}, title={Clinical Trials}, booktitle={Medical Epidemiology: Population Health and Effective Health Care, 5e}, publisher={McGraw-Hill Education}, address={New York, NY}, year={2014}, url={accessbiomedicalscience.mhmedical.com/content.aspx?aid=1108590235} }