1. Department of Dermatology University of Pennsylvania Perelman School of Medicine Philadelphia PA USA
2. Section of Pediatric Dermatology Children’s Hospital of Philadelphia Philadelphia PA USA
3. Department of Dermatology University of California San Francisco (UCSF) San Francisco CA USA
4. Pfizer, Inc. New York NY USA
5. Department of Biostatistics, Epidemiology and Informatics University of Pennsylvania Perelman School of Medicine Philadelphia PA USA