Serum levels of the N-terminal fragment of connective tissue growth factor is a novel biomarker for chronic pancreatitis oleh Naoki Morishima, Yoshihiro Kamada, Hiyori Ota, Yoshifumi Iwagami, Hidenori Takahashi, Munefumi Shimosaka, Daisuke Sakon, Jumpei Kondo, Makoto Yamada, Takashi Kumada, Hidetoshi Eguchi, Eiji Miyoshi