Eric R Carlson1, R John Tannyhill2. 1. Professor and Kelly L. Krahwinkel Chairman, Department of Oral and Maxillofacial Surgery; Director of Oral and Maxillofacial Surgery Residency Program, University of Tennessee Medical Center; Director of Oral/Head and Neck Oncologic Surgery Program, University of Tennessee Cancer Institute, Knoxville, TN. Electronic address: ecarlson@mc.utmck.edu. 2. Instructor in Oral and Maxillofacial Surgery, Harvard School of Dental Medicine; Director of Oral and Maxillofacial Surgery Residency Program, Massachusetts General Hospital, Boston, MA.