Ikeda Ryoukichi, Awataguchi Toshiichi, Shoji Fumi, Oshima Takeshi
Department of Otolaryngology, Tohoku Employees' Pension Welfare Hospital, Sendai, Japan.
Otolaryngol Head Neck Surg. 2010 Mar;142(3):458-9. doi: 10.1016/j.otohns.2009.09.019. Epub 2009 Nov 25.