[1] Mayo Clin, Dept Otolaryngol Head & Neck Surg, Gonda 12 South,200 First St SW, Rochester, MN 55905 USA
[2] Mayo Clin, Div Biomed Stat & Informat, Rochester, MN 55905 USA
[3] Loyola Univ Med Ctr, Dept Otolaryngol Head & Neck Surg, Maywood, IL 60153 USA
[4] Univ Utah, Med Ctr, Div Otolaryngol Head & Neck Surg, Salt Lake City, UT USA
[5] Univ Texas Southwestern Med Ctr Dallas, Dept Otolaryngol Head & Neck Surg, Dallas, TX 75390 USA
[6] Northwestern Univ, Dept Otolaryngol Head & Neck Surg, Chicago, IL 60611 USA
[7] Ohio State Univ, Dept Otolaryngol Head & Neck Surg, Columbus, OH 43210 USA
[8] Univ N Carolina, Dept Otolaryngol Head & Neck Surg, Chapel Hill, NC 27515 USA
[9] Univ Tennessee, Dept Otolaryngol Head & Neck Surg, Memphis, TN USA
[10] Vanderbilt Univ, Med Ctr, Dept Otolaryngol Head & Neck Surg, Nashville, TN USA
[11] Baylor Coll Med, Dept Otolaryngol Head & Neck Surg, Houston, TX 77030 USA
[12] New York Eye & Ear Infirm Mt Sinai, Dept Otolaryngol Head & Neck Surg, New York, NY USA
[13] Mayo Clin, Dept Otolaryngol Head & Neck Surg, Scottsdale, AZ USA