Stratification of G2 pancreatic neuroendocrine tumors using a Ten Percent Ki-67 index cut-off based on clinicopathological and molecular analyses

Y Yumiko Kageyama R Ryo Ashida N Nobuyuki Ohike K Keiichi Ohshima T Tomoko Norose K Katsuhisa Ohgi M Mihoko Yamada S Shimpei Otsuka Y Yoshiyasu Kato H Hidemasa Kubo K Katsuhiko Uesaka T Teiichi Sugiura T Takashi Sugino A Akihumi Notsu A Akane Naruoka T Takeshi Nagashima K Kenichi Urakami K Ken Yamaguchi