[1] Christus Santa Rosa Childrens Hosp, Dept Pathol, San Antonio, TX 78207 USA
[2] Univ Texas SW Med Ctr Dallas, Dept Dermatol, Dallas, TX 75390 USA
[3] Univ Texas Hlth Sci Ctr San Antonio, Dept Pathol, San Antonio, TX 78229 USA
[4] Univ Texas Hlth Sci Ctr San Antonio, Dept Med & Pediat, Div Dermatol, San Antonio, TX USA