[1] Brown Univ, Warren Alpert Med Sch, Dept Dermatol, Providence, RI 02912 USA
[2] Univ Arizona, Coll Med, Tucson, AZ USA
[3] Univ Med & Dent New Jersey, Robert Wood Johnson Med Sch, Dept Dermatol, New Brunswick, NJ USA
[4] Rhode Isl Hosp, Dept Pathol, Providence, RI 02902 USA