1Ames Research Center, National Aeronautics and Space Administration, Moffett Field, CA 94035, USA, , , , US
2Department of Otolaryngology and Department of Neurobiology, Washington University, St. Louis, MO 63110, USA, , , , US
3Department of Otolaryngology/Head and Neck Surgery, Virginia Merrill Bloedel Hearing Research Center, University of Washington, Seattle, WA 98195, USA, , , , US
4Department of Otolaryngology/Head-Neck Surgery and Department of Physiology and Pharmacology, Oregon Health Sciences University, Portland, OR 97201, USA, , , , US