1 Division of Otology-Neurotology & Skull Base Surgery, Mayo Clinic, Gonda Building, 12S-ENT, 200 First Street, Rochester, MN 55905, USA. Electronic address: carlson.matthew@mayo.edu.
2 Division of Otolaryngology-Head & Neck Surgery and Neurological Surgery, Neurotology Fellowship Program, The Otology Group of Vanderbilt, Vanderbilt University Medical Center, 1215 21st Avenue South, 7209 Medical Center East, South Tower, Nashville, TN 37232, USA. Electronic address: george.wanna@Vanderbilt.edu.