@inbook{7254606,
author={Carrie Foust Koenigsfeld and Darla Klug Eastman and Anisa Fornoff},
editor={Sutton, S. Scott},
title={Chapter 51. Headache},
booktitle={McGraw-Hill's NAPLEX® Review Guide},
publisher={The McGraw-Hill Companies},
address={New York, NY},
year={2011},
url={accesspharmacy.mhmedical.com/content.aspx?aid=7254606}
}