^○Goda Kenichui¹, Ikegami Masahiro², Tajiri Hisao³ (1.Dept. of Endoscopy, The Jikei Univ. Sch. of Med., Tokyo, Japan, 2.Dept. of Pathology, The Jikei Univ. Sch. of Med., Tokyo, Japan, 3.Div. of Gastroenterology and Hepatology, Dept. of Internal Medicine, The Jikei Univ. Sch. of Med., Tokyo, Japan)

^○Pouw Roos (Dept. of Gastroenterology and Hepatology, Academic Medical Center, Amsterdam, the Netherlands)

^○Fonseca Ricardo (Instituto Português de Oncologia de Lisboa, Lisbon, Portugal)

^○Uedo Noriya, Ishihara Ryu, Iishi Hiroyasu (Department of Gastrointestinal Oncology, Osaka Medical Center for Cancer and Cardiovascular Diseases, Japan)

^○Kaminski Michal F. (Department of Gastroenterological Oncology The Maria Sklodowska-Curie Memorial Cancer Center and Institute of Oncology Warsaw, Poland)

^○Matsuda Takahisa¹, Saito Yutaka¹, Sekine Shigeki² (1.Endoscopy Division, National Cancer Center Hospital, Tokyo, Japan, 2.Pathology Division, National Cancer Center Hospital, Tokyo, Japan)

^○Ochiai Atsushi (National Cancer Center Research Institute, Hospital Centeral and Hospital East)