@inbook{57220001,
author={Donna West-Strum},
editor={Yang, Yi and West-Strum, Donna},
title={Chapter 1. Introduction to Pharmacoepidemiology},
booktitle={Understanding Pharmacoepidemiology},
publisher={The McGraw-Hill Companies},
address={New York, NY},
year={2011},
url={accesspharmacy.mhmedical.com/content.aspx?aid=57220001}
}