@inbook{57836247, author={Michaela A. Dinan}, editor={Lopes, Renato D. and Harrington, Robert A.}, title={Chapter 10. Observational Research}, booktitle={Understanding Clinical Research}, publisher={The McGraw-Hill Companies}, address={New York, NY}, year={2013}, url={accessbiomedicalscience.mhmedical.com/content.aspx?aid=57836247} }