(1) Department of Surgery, Hokushu Central Hospital, 10-5 Hanazono–cho, Takanosu, Akita 018-33, Japan, JP;(2) Department of Surgery, Akita University School of Medicine, 1-1-1 Hondo, Akita 010, Japan, JP
Abstract:
(Received for publication on Oct. 7, 1996; accepted on July 8, 1997)