1 Department of Otolaryngology, David Grant USAF Medical Center, 101 Bodin Circle/SGCXA, Travis AFB, CA 94535, USA.
2 Department of Oral and Maxillofacial Surgery, David Grant USAF Medical Center, 101 Bodin Circle/SGDD, Travis AFB, CA 94535, USA. Electronic address: david.webb.5@us.af.mil.