Laparoscopic and endoscopic cooperative surgery for intra-mucosal gastric carcinoma adjacent to the ulcer scars oleh Masahiko Aoki, Satoshi Tokioka, Ken Narabayashi, Akitoshi Hakoda, Yosuke Inoue, Naoki Yorifuji, Yoshihide Chino, Isao Sato, Yutaro Egashira, Toshihisa Takeuchi, Kazuhide Higuchi