1. Section of Dermatology; Department of Pediatrics; Children's Hospital of Philadelphia; Philadelphia Pennsylvania
2. Department of Dermatology; Perelman School of Medicine; University of Pennsylvania; Philadelphia Pennsylvania
3. Department of Dermatology; Medical University of South Carolina; Charleston South Carolina
4. Department of Pediatrics; Medical University of South Carolina; Charleston South Carolina
5. Division of Oncology; Children's Hospital of Philadelphia; Philadelphia Pennsylvania
6. Department of Pathology; Stanford Medical Center; Palo Alto California
7. Department of Dermatology; Stanford Medical Center; Palo Alto California