[1] Mayo Clin, Dept Dermatol & Pediat, Rochester, MN 55902 USA
[2] Rady Childrens Hosp, Div Pediat & Adolescent Dermatol, San Diego, CA USA
[3] Univ Calif San Diego, Sch Med, Dept Dermatol, La Jolla, CA 92093 USA
[4] Univ Calif San Diego, Sch Med, Dept Pediat, La Jolla, CA 92093 USA
[5] Northwestern Univ, Feinberg Sch Med, Dept Dermatol, Chicago, IL 60611 USA
[6] Northwestern Univ, Feinberg Sch Med, Dept Pediat, Chicago, IL 60611 USA
[7] Med Dermatol Associates Chicago, Chicago, IL USA
[8] Univ Penn, Div Allergy & Immunol, Childrens Hosp Philadelphia, Dept Pediat,Perelman Sch Med, Philadelphia, PA 19104 USA