@inbook{1163446978, author={Brian G. Ragan}, editor={Starkey, Chad}, title={The Physiology and Psychology of Pain}, booktitle={Therapeutic Modalities, 4e}, publisher={F. A. Davis Company}, address={New York, NY}, year={2013}, url={fadavisat.mhmedical.com/content.aspx?aid=1163446978} }