1. Division of Dermatology, UCLA School of Medicine, Los Angeles, CA 90024.
2. Department of Neurology, University of Southern California School of Medicine, Los Angeles, CA 90033.
3. Childrens Hospital Los Angeles, Los Angeles, CA 90054, and Department of Pediatrics, University of Southern California School of Medicine, Los Angeles, CA 90033.
4. Section of Dermatology, University of Southern California School of Medicine, Los Angeles, CA 90033.
5. Howard Hughes Medical Institute, Albert Einstein College of Medicine, Bronx, NY 10461.
6. Division of Dermatology, and Department of Microbiology and Immunology, UCLA School of Medicine, Los Angeles, CA 90033.