1. Department of Dermatology; Perelman School of Medicine; University of Pennsylvania; Philadelphia Pennsylvania
2. Division of Dermatology; Department of Medicine; School of Medicine; Washington University in St. Louis; St. Louis Missouri
3. Division of Oncology; Children's Hospital of Philadelphia; Philadelphia Pennsylvania
4. Department of Pathology; Children's Hospital of Philadelphia; Philadelphia Pennsylvania
5. Division of Dermatology; Department of Pediatrics; Seattle Children's Hospital; Seattle Washington
6. Section of Pediatric Dermatology; Children's Hospital of Philadelphia; Philadelphia Pennsylvania