N Engl J Med 2015 Nov;373(20):1926-36
From the Departments of Dermatology and Pathology (A.H.S., I.Y., E.T., A.G., J.N., L.P., B.R., B.C.B.) and the Helen Diller Family Comprehensive Cancer Center (A.H.S., I.Y., E.T., A.G., B.C.B.), University of California, San Francisco (UCSF), San Francisco; the Departments of Dermatology and Pathology, Cleveland Clinic, Cleveland (I.K.); the Department of Pathology, Orlando Health, Orlando, FL (A.S.); the Department of Dermatology, University Hospital of Zurich, Zurich, Switzerland (R.D.); and the Department of Dermatology, Dorset County Hospital, Dorchester (C.D.), and the Department of Dermatology, St. John's Institute of Dermatology, London (W.R., A.R.) - both in the United Kingdom.