1. Department of Otolaryngology—Head and Neck Surgery, University of Texas Health Science Center San Antonio, San Antonio, Texas
2. Department of Otolaryngology—Head and Neck Surgery, Uniformed Services University of Health Sciences, San Antonio, Texas
3. Department of Anesthesiology, University of Texas Health Science Center San Antonio, San Antonio, Texas
4. Department of Otolaryngology, Vanderbilt University, Nashville, Tennesee