[1] Montefiore Med Ctr, Albert Einstein Canc Ctr, Dept Dermatol, Bronx, NY 10467 USA
[2] Univ Penn, Dept Dermatol, Perelman Sch Med, Div Dermatopathol, Philadelphia, PA 19104 USA
[3] Univ Penn, Dept Surg, Perelman Sch Med, Div Plast Surg, Philadelphia, PA 19104 USA
[4] Univ Penn, Dept Pathol & Lab Med, Perelman Sch Med, Philadelphia, PA USA