1. Department of Dermatology Perelman School of Medicine at the University of Pennsylvania Philadelphia Pennsylvania USA
2. Department of Oral & Maxillofacial Surgery and Pharmacology, School of Dental Medicine University of Pennsylvania Philadelphia Pennsylvania USA
3. Department of Otorhinolaryngology/Head and Neck Surgery Perelman School of Medicine at the University of Pennsylvania Philadelphia Pennsylvania USA
4. Department of Oncology Abramson Cancer Center, Perelman School of Medicine at the University of Pennsylvania Philadelphia Pennsylvania USA