National Institute of Sensory Organs, National Tokyo Medical Center, Tokyo, Japan;
Department of Otolaryngology—Head and Neck Surgery, Nihon University School of Medicine, Tokyo, Japan;
National Institute of Sensory Organs, National Tokyo Medical Center, Tokyo, Japan;
Department of Otolaryngology—Head and Neck Surgery, Nihon University School of Medicine, Tokyo, Japan;
Department of Speech, Language and Hearing Therapy, Mejiro University, Saitama, Japan;
Department of Speech, Language and Hearing Therapy, Mejiro University, Saitama, Japan;
Kawagoe Otology Institute, Saitama, Japan;
National Institute of Sensory Organs, National Tokyo Medical Center, Tokyo, Japan;