^○Mathieu Pioche^1,2 (1.Endoscopy unit, Universitary hospital, Lyon, France, 2.Endoscopy unit, National cancer center, Tokyo, Japan)

^○Werner Dolak (Division of Gastroenterology and Hepatology, Department of Internal Medicine III, Medical University of Vienna, Austria)

^○Ichiro Oda (Endoscopy Division, National Cancer Center Hospital, Tokyo, Japan)

^○Jan Martínek (Department of Hepatogastroenterology, IKEM, Prague, Czech Republic)

^○Kenichi Goda¹, Akira Dobashi², Hisao Tajiri² (1.Department of Endoscopy, The Jikei Universioty School of Medicine, Tokyo, Japan, 2.Division of Gastroenterology and Hepatology, Department of internal medicine, The Jikei University School of Medicine, Tokyo, Japan)

^○Hitomi Minami¹, Haruhiro Inoue², Kazuhiko Nakao¹ (1.Nagasaki University Hospital, Department of Gastroenterology and Hepatology, Japan, 2.Showa University, Northern Yokohama Hospital, Digestive disease center, Japan)

^○Kenshi Yao (Department of Endoscopy, Fukuoka University Chikushi Hospital, Japan)

^○Manabu Muto¹, Hisao Tajiri² (1.Kyoto University Hospital, Department of Clinical Oncology, Japan, 2.Tokyo Jikei University Hospital. Department of Gastroenterology and Hepatolgy,Japan)

^○Mitsuhiro Fujishiro (Department of Endoscopy and Endoscopic Surgery, The University of Tokyo Hospital, Tokyo, Japan)

^○Mário Dinis-Ribeiro (Instituto Portugues de Oncologia do Porto, Portugal)