@inbook{56025003,
author={Johann E. Gudjonsson and James T. Elder},
editor={Goldsmith, Lowell A. and Katz, Stephen I. and Gilchrest, Barbara A. and Paller, Amy S. and Leffell, David J. and Wolff, Klaus},
title={Chapter 18. Psoriasis},
booktitle={Fitzpatrick's Dermatology in General Medicine, 8e},
publisher={The McGraw-Hill Companies},
address={New York, NY},
year={2012},
url={accessmedicine.mhmedical.com/content.aspx?aid=56025003}
}