[1] Soc Hill Dermatol, Philadelphia, PA 19107 USA
[2] Childrens Healthcare Atlanta, Atlanta, GA USA
[3] Philadelphia Coll Osteopath Med, Philadelphia, PA USA
[4] Columbia Univ, St Lukes Roosevelt Hosp Ctr, Coll Phys & Surg, Div Dermatol, New York, NY USA
[5] Columbia Univ, St Lukes Roosevelt Hosp Ctr, Coll Phys & Surg, Skin Color Ctr, New York, NY USA
[6] Univ Penn, Dept Dermatol, Philadelphia, PA 19104 USA