Osaka Metropolitan University Graduate School of Medicine, Osaka, Japan
Izumiotsu Municipal Hospital, Osaka, Japan
Baba Memorial Hospital, Osaka, Japan
Minami Osaka Hospital, Osaka, Japan
Ishikawa Prefectural Central Hospital, Ishikawa, Japan
Osaka City General Hospital, Osaka, Japan
Nihon University Hospital, Tokyo, Japan
Chiba-nishi General Hospital, Chiba, Japan
Tokyo Metropolitan Institute for Geriatrics and Gerontology, Tokyo, Japan
Keio University School of Medicine, Tokyo, Japan
Tottori University, Yonago, Japan
Ishikiriseiki Hospital, Osaka, Japan
Shizuoka Cancer Center Endoscopy Division, Suntougun, Japan
National Hospital Organization Okayama Medical Center, Okayama, Japan
Kanazawa University, Ishikawa, Japan
Osaka Ekisaikai Hospital, Osaka, Japan
Kashiwara Municipal Hospital, Osaka, Japan
Dokkyo Medical University, Tochigi, Japan
Tsuyama Chuo Hospital, Okayama, Japan
Nara Medical University, Nara, Japan
Osaka International Cancer Institute, Osaka, Japan
Japan Red Cross Wakayama Medical Center, Wakayama-city, Japan
Osaka Medical and Pharmaceutical University, Osaka, Japan
International University of Health and Welfare Ichikawa Hospital, Ichikawa, Japan
Yuri Kumiai General Hospital, Akita, Japan
Kindai University Faculty of Medicine, Osaka, Japan
Ikuwakai Memorial Hospital, Osaka, Japan
Nakae Hospital, Wakayama, Japan
Nara city hospital, Nara, Japan
Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan
Fukui Prefectural Hospital, Fukui, Japan
Osaka Red Cross Hospital, Osaka, Japan
Shuto General Hospital, Yamaguchi, Japan
Shiga University of Medical Sciences, Otsu, Japan
Yamagata University Faculty of Medicine, Yamagata, Japan
Kyoto Second Red Cross Hospital, Kyoto, Japan
Hanwa Memorial Hospital, Osaka, Japan
Asakayama General Hospital, Osaka, Japan
Nagayoshi General Hospital, Osaka, Japan
Naniwa Ikuno Hospital, Osaka, Japan
Hyogo Cancer Center, Hyogo, Japan
Wakayama Medical University Second Department, Wakayama, Japan
Tonan Hospital, Hokkaido, Japan
University of Tsukuba, Tsukuba, Japan
Mie University Hospital, Tsu, Japan
Kansai Rosai Hospital, Hyogo, Japan
Graduate School of Medicine, Akita University, Akita, Japan