1 Division of Research and Development for Minimally Invasive Treatment, Cancer Center, Keio University School of Medicine, Tokyo, Japan.
2 Department of Gastrointestinal Oncology, Osaka International Cancer Institute, Osaka, Japan.
3 Department of Gastroenterology, Toranomon Hospital, Tokyo, Japan.
4 Department of Endoscopy, Saku Central Hospital Advanced Care Center, Nagano, Japan.
5 Endoscopy Division, National Cancer Center Hospital, Tokyo, Japan.
6 Department of Gastroenterology, Cancer Institute Hospital of the Japanese Foundation for Cancer Research, Tokyo, Japan.
7 Division of Endoscopy, Shizuoka Cancer Center, Shizuoka, Japan.
8 Department of Gastrointestinal Endoscopy, NTT Medical Center Tokyo, Tokyo, Japan.
9 Department of Medicine, Division of Gastroenterology, Jichi Medical University, Shimotsuke, Japan.
10 Department of Endoscopy, The Jikei University School of Medicine, Tokyo, Japan.
11 Department of Gastroenterology, Ishikawa Prefectural Central Hospital, Kanazawa, Japan.
12 Department of Molecular Gastroenterology and Hepatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan.
13 Department of Gastroenterology, Okayama University Hospital, Okayama, Japan.
14 Department of Gastroenterology, Juntendo University School of Medicine, Tokyo, Japan.
15 Department of Gastroenterology, National Hospital Organization Kyoto Medical Center, Kyoto, Japan.
16 Division of Gastroenterology, Matsuyama Red Cross Hospital, Matsuyama, Japan.
17 Department of Gastroenterology, Saitama Medical University International Medical Center, Saitama, Japan.
18 Department of Surgery, Kyorin University School of Medicine, Tokyo, Japan.