1 Department of Otolaryngology-Head and Neck Surgery, Mayo Clinic, Phoenix, Arizona, USA.
2 Department of Otolaryngology-Head and Neck Surgery, Louisiana State University Health Sciences Center, Feist-Weiller Cancer Center, Shreveport, Louisiana, USA.
3 Head and Neck Surgery, Southern California Permanente Medical Group, Pasadena, California, USA.
4 PDX ENT and Audiology Medical Group, Portland, Oregon, USA.