1. Department of Dermatology; School of Medicine; Stanford University; Palo Alto California
2. Division of General and Community Pediatrics; Cincinnati Children's Hospital Medical Center; Cincinnati Ohio
3. Department of Dermatology; Feinberg School of Medicine; Northwestern University; Chicago Illinois
4. Department of Pediatrics; Feinberg School of Medicine; Northwestern University; Chicago Illinois
5. Department of Dermatology; University of Colorado School of Medicine; Aurora Colorado
6. Department of Pediatrics; University of Colorado School of Medicine; Aurora Colorado
7. Department of Dermatology; Hospital for Sick Children; University of Toronto; Toronto Ontario Canada
8. Department of Dermatology; Columbia University Medical Center; New York New York
9. Department of Pediatrics; Columbia University Medical Center; New York New York
10. Department of Dermatology; Dell Children's Medical Center of Central Texas; Austin Texas
11. Department of Dermatology; University of Rochester Medical Center; Rochester New York