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, and 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, and Director of Oral and Maxillofacial Surgery Residency Program, Massachusetts General Hospital, Boston, MA.