1. Division of Pediatric Dermatology Children's National Medical Center Washington DC USA
2. Department of Dermatology University of New Mexico Albuquerque New Mexico USA
3. School of Medicine University of New Mexico Albuquerque New Mexico USA
4. Department of Internal Medicine, Division of Epidemiology, Biostatistics, and Preventive Medicine University of New Mexico Albuquerque New Mexico USA
5. Department of Pediatrics University of New Mexico Albuquerque New Mexico USA