T. Takeda1, K. Omura1, E. Mori1, R. Mori2, Y. Ishii2, N. Otori1
1Department of Otorhinolaryngology, The Jikei University School of Medicine, 3-19-18 Nishi-shinbashi, Minato-ku, Tokyo, 105-8471, Japan
2Department of Neurosurgery, The Jikei University School of Medicine, Tokyo, Japan