1. Institute of Human Genetics and Department of Microbiology, University of Minnesota Medical School, Minneapolis 55455.
2. Department of Dermatology, Jikei University School of Medicine, 19-18 Nishishinibashi 3-Chome, Minato-Ku, Tokyo, Japan.
3. Departments of Obstetrics and Gynecology, Laboratory Medicine, and Pathology, University of Minnesota Medical School, Minneapolis 55455.
4. Department of Dermatology, Mayo Clinic, Rochester, MI 55905.
5. Department of Dermatology, University of Minnesota Medical School, Minneapolis 55455.