Misako Hashimoto-Ikehara
Hyogo College of Medicine, Nishinomiya, Japan
Yasuo Mishiro
Hyogo College of Medicine, Nishinomiya, Japan
Tadashi Kitahara
Osaka Rosai Hospital, Sakai, Japan
Masafumi Sakagami
Department of Otolaryngology, Hyogo College of Medicine, Nishinomiya, Hyogo 663-8501, Japan