(1) Department of Surgery, Yamaguchi Central Hospital, 77 Osaki, Hofu, Yamaguchi 747-8511, Japan, JP;(2) First Department of Surgery, Yamaguchi University, School of Medicine, 1144 Kogushi, Ube 755-8505, Japan, JP
Abstract:
(Received for publication on June 20, 1997; accepted on Jan. 6, 1998)