1. Department of Otolaryngology, Dartmouth-Hitchcock Medical Center, Lebanon, NH, USA
2. Neuroscience Institute, Virginia Mason Medical Center, Seattle, WA, USA
3. Department of Neurosurgery, Virginia Mason Medical Center, Seattle, WA, USA
4. Listen for Life Center, Department of Otolaryngology-Head and Neck Surgery, Virginia Mason Medical Center, Seattle, WA 98101, USA