[1] Indiana Univ, Dept Dermatol, Indianapolis, IN 46204 USA
[2] Indiana Univ, Dept Pediat, Indianapolis, IN 46204 USA
[3] Indiana Univ, Dept Med, Div Biostat, Indianapolis, IN 46204 USA
[4] Columbia Univ, Dept Dermatol, New York, NY 10027 USA
[5] Columbia Univ, Dept Pediat, New York, NY 10027 USA
[6] Hosp Santa Creu I Sant Pau, Dept Dermatol, Barcelona, Spain
[7] Northwestern Univ, Feinberg Sch Med, Dept Pediat, Evanston, IL USA
[8] Northwestern Univ, Feinberg Sch Med, Dept Dermatol, Evanston, IL USA
[9] Univ Calif San Francisco, Dept Dermatol, San Francisco, CA 94143 USA
[10] Med Coll Wisconsin, Dept Dermatol, Milwaukee, WI 53226 USA
[11] Kaiser Permanente, San Francisco, CA USA
[12] Univ Montreal, Dept Pediat, Div Dermatol, CHU St Justine, Montreal, PQ H3C 3J7, Canada
[13] Baylor Coll Med, Dept Dermatol, Houston, TX 77030 USA
[14] Oregon Hlth & Sci Univ, Dept Dermatol, Portland, OR 97201 USA