1. The Departments of Otolaryngology and Head and Neck Surgery, Columbia University College of Physicians and Surgeons, New York, NY 10032
2. The Sol Goldman Pancreatic Cancer research Center, Department of Pathology, The Johns Hopkins University Medical Institutions, Baltimore, MD 21205
3. Microbiology Department, School of Medicine, Ankara University, Turkey
4. McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore, MD 21205
5. Department of Surgery, Division of Surgical Oncology, Moores Cancer Center, University of California, San Diego, La Jolla, CA 92093-0987
6. Department of Pathology, Columbia University College of Physicians and Surgeons, New York, NY 10032