1. From the Mayo Clinic Alix School of Medicine, Jacksonville, Florida, USA.
2. Department of Pediatric and Adolescent Medicine, Mayo Clinic, Rochester, Minnesota, USA.
3. Department of Dermatology, Mayo Clinic, Scottsdale, Arizona, USA.
4. Department of Dermatology, Mayo Clinic, Rochester, Minnesota, USA.
5. Department of Dermatology, Mayo Clinic, Jacksonville, Florida, USA.