Introcaso Camille E, Rady Peter L, He Qin, Tyring Stephen K, Kovarik Carrie L
Department of Dermatology, Pennsylvania Hospital, 801 Spruce Street, Philadelphia, PA 19107, USA.
Int J Dermatol. 2012 Jun;51(6):713-5. doi: 10.1111/j.1365-4632.2011.05039.x.