1 Department of Otolaryngology-Head and Neck Surgery, University of Cincinnati, Cincinnati, Ohio, U.S.A.
2 Surgical Services, Cincinnati Veterans Affairs Medical Center, Cincinnati, Ohio, U.S.A.
3 Division of Otolaryngology-Head and Neck Surgery, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin, U.S.A.
4 Division of Sleep Surgery, Department of Otolaryngology-Head and Neck Surgery, University of California, San Francisco, San Francisco, California, U.S.A.
5 Surgical Services, San Francisco Veterans Affairs Healthcare System, San Francisco, California, U.S.A.
6 Department of Otorhinolaryngology-Head and Neck Surgery, University of Pennsylvania, Philadelphia, Pennsylvania, U.S.A.
7 Department of Otolaryngology-Head and Neck Surgery, University of Miami, Miami, Florida, U.S.A.