1. Department of Otolaryngology-Head and Neck Surgery; University of Texas Health Science Center at San Antonio; San Antonio Texas U.S.A
2. Department of Anesthesiology; University of Texas Health Science Center at San Antonio; San Antonio Texas U.S.A
3. San Antonio Uniformed Services Health Education Consortium; Brooke Army Medical Center; San Antonio Texas U.S.A
4. Department of Pathology; University of Texas Health Science Center at San Antonio; San Antonio Texas U.S.A
5. Department of Surgery; Uniformed Services University; Bethesda Maryland U.S.A
6. Department of Otolaryngology-Head and Neck Surgery; Georgetown University Medical Center, MedStar Health; Washington District of Columbia U.S.A
7. Department of Otolaryngology-Head & Neck Surgery; San Antonio Uniformed Services Health Education Consortium; JBSA-Ft Sam Houston Texas U.S.A