1. Department of Otorhinolaryngology The University of Pennsylvania Philadelphia Pennsylvania USA
2. Department of Medicine The University of Chicago Chicago Illinois USA
3. Department of Pathology The University of Pennsylvania Philadelphia Pennsylvania USA
4. School of Dentistry Virginia Commonwealth University Richmond Virginia USA
5. Department of Head and Neck Surgery The MD Anderson Cancer Center Houston Texas USA
6. Department of Radiation Oncology The University of Pennsylvania Philadelphia Pennsylvania USA
7. Department of Medicine The University of Pennsylvania Philadelphia Pennsylvania USA
8. Department of Surgery University of California San Diego San Diego California USA
9. Department of Biostatistics The University of Pennsylvania Philadelphia Pennsylvania USA
10. The Wistar Institute Philadelphia Pennsylvania USA