Correspondence: Toshinori Komatsu
Toshinori KOMATSU
Tomohiro YOSHIMOTO
Noriatsu SAEKI
Sohei SHINKA
 Department of Immunology and Medical Zoology, Hyogo College of Medicine, 1-1, Mukogawa-cho, Nishinomiya, Hyogo 663, Japan

Haruki OKAMURA
Department of Bacteriology, Hyogo College of Medicine, 1-1, Mukogawa-cho, Nishinomiya, Hyogo 663, Japan

Atsushi YAMATODANI
Department of Medical Physicis, School of allied Health Sciences, Faculty of Medicine, Osaka University, Yamadaoka 2-2, Suita, Osaka 565, Japan.