Department of Gastroenterology and Metabolism;
Nagoya City University Graduate School of Medical Sciences;
Nagoya 467-8601;
Japan;
Department of Gastroenterology;
Yamagata University Faculty of Medicine;
Yamagata 990-9585;
Japan;
Department of Gastroenterology;
Tokai University School of Medicine;
Kanagawa 259-1153;
Japan;
Gastroenterologic Surgery;
Division of Cancer Medicine;
Graduate School of Medical Science;
Kanazawa University;
Kanazawa 920-8640;
Japan;
Department of Gastroenterology;
Kasugai Municipal Hospital;
Kasugai 486-8510;
Japan;
Department of Surgery;
Kansai Rosai Hospital;
Osaka 660-8511;
Japan;
Department of Medicine;
Teikyo University School of Medicine;
Tokyo 173-8606;
Japan;