[1] Univ N Carolina, Dept Dermatol, Chapel Hill, NC 27599 USA
[2] Texas Childrens Hosp, Baylor Coll Med, Dept Dermatol, Houston, TX 77030 USA
[3] Texas Childrens Hosp, Baylor Coll Med, Dept Pediat, Houston, TX 77030 USA
[4] Univ Calif San Francisco, Dept Radiol, San Francisco, CA 94143 USA
[5] Univ Calif San Francisco, Dept Neurol, San Francisco, CA 94143 USA
[6] Univ Calif San Francisco, Dept Pediat, San Francisco, CA 94143 USA
[7] Univ Calif San Francisco, Dept Dermatol, San Francisco, CA 94143 USA