[1] Childrens Hosp Philadelphia, Sect Dermatol, 3401 Civ Ctr Blvd, Philadelphia, PA 19104 USA
[2] Univ Penn, Perelman Sch Med, Philadelphia, PA 19104 USA
[3] Univ Penn, Wharton Sch, Philadelphia, PA 19104 USA
[4] Univ Penn, Dept Pediat, Perelman Sch Med, Philadelphia, PA 19104 USA
[5] Univ Penn, Dept Dermatol, Perelman Sch Med, Philadelphia, PA 19104 USA
[6] Childrens Hosp Philadelphia, Dept Pediat, Philadelphia, PA 19104 USA