1. Department of Pathology; Memorial Sloan-Kettering Cancer Center; New York New York
2. University of Pittsburgh-Carnegie Mellon University; Pittsburgh Pennsylvania
3. Department of Otolaryngology/Head and Neck Surgery; University of Pittsburgh Medical Center; Pittsburgh Pennsylvania
4. Department of Radiology; University of Pittsburgh Medical Center; Pittsburgh Pennsylvania
5. Department of Pathology; Virginia Mason Medical Center; Seattle Washington
6. Department of Pathology; University of Pittsburgh Medical Center; Pittsburgh Pennsylvania