Potential for expanding indications and curability criteria of endoscopic resection for early gastric cancer in elderly patients: results from a Japanese multicenter prospective cohort study

Masau Sekiguchi, Haruhisa Suzuki, Kohei Takizawa, Toshiaki Hirasawa, Yoji Takeuchi, Kenji Ishido, Shu Hoteya, Tomonori Yano, Shinji Tanaka, Yosuke Toya, Masahiro Nakagawa, Takashi Toyonaga, Kenichi Takemura, Kingo Hirasawa, Mitsuru Matsuda, Hironori Yamamoto, Yosuke Tsuji, Satoru Hashimoto, Yuki Maeda, Tsuneo Oyama, Ryuta Takenaka, Yoshinobu Yamamoto, Taichi Shimazu, Hiroyuki Ono, Satoshi Tanabe, Hitoshi Kondo, Hiroyasu Iishi, Motoki Ninomiya, Ichiro Oda