[1] Univ Texas Hlth Sci Ctr San Antonio, Dept Otolaryngol Head & Neck Surg, San Antonio, TX 78229 USA
[2] Uniformed Serv Univ Hlth Sci, Dept Otolaryngol Head & Neck Surg, 7400 Merton Minter Dr, San Antonio, TX 78229 USA
[3] Univ Texas Hlth Sci Ctr San Antonio, Dept Anesthesiol, San Antonio, TX 78229 USA
[4] Vanderbilt Univ, Dept Otolaryngol, 221 Kirkland Hall, Nashville, TN 37235 USA