1. Perelman School of MedicineUniversity of Pennsylvania Philadelphia Pennsylvania
2. Department of DermatologyPerelman School of MedicineUniversity of Pennsylvania Philadelphia Pennsylvania
3. Division of Human GeneticsChildren's Hospital of Philadelphia Philadelphia Pennsylvania
4. Department of PediatricsPerelman School of Medicine at the University of Pennsylvania Philadelphia Pennsylvania
5. Section of DermatologyChildren's Hospital of Philadelphia Philadelphia Pennsylvania
6. Department of Pathology and Laboratory MedicineChildren's Hospital of Philadelphia Philadelphia Pennsylvania