[1] Univ Penn, Perelman Sch Med, Philadelphia, PA 19104 USA
[2] Dermatol & Skin Surg Ctr, Kennett Sq, PA USA
[3] Univ Penn, Perelman Ctr Adv Med, Abramson Canc Ctr, Philadelphia, PA 19104 USA
[4] Univ Penn, Dept Dermatol, Perelman Sch Med, Philadelphia, PA 19104 USA