Johnson Timothy M, Sondak Vernon K, Bichakjian Christopher K, Sabel Michael S
Department of Dermatology, University of Michigan Medical School, Ann Arbor, Michigan, USA.
J Am Acad Dermatol. 2006 Jan;54(1):19-27. doi: 10.1016/j.jaad.2005.09.029. Epub 2005 Dec 2.