[1] Washington Univ, Sch Med, St Louis, MO 63110 USA
[2] Washington Univ, Sch Med, Dept Immunol & Pathol, St Louis, MO USA
[3] Washington Univ, Sch Med, Dept Med, Div Dermatol, St Louis, MO 63110 USA
[4] Washington Univ, Sch Med, Dept Pediat, Div Dermatol, St Louis, MO 63110 USA