[1] Univ Penn, Childrens Hosp Philadelphia, Perelman Sch Med, Philadelphia, PA 19104 USA
[2] Augusta Univ, Med Coll Georgia, Augusta, GA USA
[3] Northwestern Univ, Feinberg Sch Med, Chicago, IL 60611 USA
[4] Bnai Zion Med Ctr, Haifa, Israel
[5] Pfizer Inc, Collegeville, PA USA
[6] Univ Sheffield, Sheffield Dermatol Res, IICD, Sheffield, S Yorkshire, England