1. Division of Dermatology; Departments of Medicine and Pediatrics; School of Medicine; Washington University School of Medicine; St. Louis MO USA
2. Philadelphia College of Osteopathic Medicine; Philadelphia PA USA
3. Department of Dermatology; Perelman School of Medicine; University of Pennsylvania; Philadelphia PA USA
4. Department of Microbiology; Perelman School of Medicine; University of Pennsylvania; Philadelphia PA USA
5. Section of Dermatology; Children's Hospital of Philadelphia; Philadelphia PA USA