Efficacy of serial pancreatic juice aspiration cytological examination for focal pancreatic duct stenosis: Multicenter, retrospective, cohort study - Yosuke Ohashi; Takuji Iwashita; Shota Iwata; Akihiko Senju; Shinya Uemura; Keisuke Iwata; Akinori Maruta; Junji Kawaguchi; Naoki Mita; Masatoshi Mabuchi; Yasuhiro Oshima; Masahito Shimizu (Endoscopy International Open, 2025)