1 School of Medicine, Stanford University, Stanford, California.
2 Division of Neurotology and Skull Base Surgery, Department of Otolaryngology-Head and Neck Surgery, University of California, Irvine, California.
3 Division of Neurotology and Skull Base Surgery, Department of Otolaryngology-Head and Neck Surgery, Department of Biomedical Engineering, University of California, Irvine, California.