[1] Thomas Jefferson Univ, Jefferson Med Coll, Dept Dermatol & Cutaneous Biol, Philadelphia, PA 19107 USA
[2] Thomas Jefferson Univ, Jefferson Med Coll, Jefferson Ctr Int Dermatol, Philadelphia, PA 19107 USA
[3] Univ Penn, Sch Med, Dept Dermatol, Philadelphia, PA 19104 USA