Correspondence: Toru Abo
Manabu Haga
Shoji Eguchi
Takehiro Watanabe
Second Department of Surgery, Niigata University School of Medicine, Asashimachi 1, Niigata 951, Japan
Hiroho Sekikawa
Hisami Watanabe
Toru Abo
Department of Immunology, Niigata University School of Medicine, Asashimachi 1, Niigata 951, Hapan