Proposed modification of the eighth edition of the AJCC-ypTNM staging system of esophageal squamous cell cancer treated with neoadjuvant chemotherapy: Unification of the AJCC staging system and the Japanese classification

Taro Oshikiri, Hironobu Goto, Takashi Kato, Ryuichiro Sawada, Hitoshi Harada, Naoki Urakawa, Hiroshi Hasegawa, Shingo Kanaji, Kimihiro Yamashita, Takeru Matsuda, Yasuhiro Fujino, Masahiro Tominaga, Yoshihiro Kakeji