Surgical risk and benefits of laparoscopic surgery for elderly patients with gastric cancer: a multicenter prospective cohort study

Michitaka Honda, Hiraku Kumamaru, Tsuyoshi Etoh, Hiroaki Miyata, Yuichi Yamashita, Kazuhiro Yoshida, Yasuhiro Kodera, Yoshihiro Kakeji, Masafumi Inomata, Hiroyuki Konno, Yasuyuki Seto, Seigo Kitano, Masahiko Watanabe, Naoki Hiki