Cohen O G, Margolis D J, Wehner M R
University of Pennsylvania Perelman School of Medicine, Pennsylvania, PA, U.S.A.
University of Pennsylvania Department of Dermatology, Pennsylvania, PA, U.S.A.
Br J Dermatol. 2020 Jun;182(6):1487-1488. doi: 10.1111/bjd.18779. Epub 2020 Jan 14.