Safety and efficacy of endoscopic ultrasound‐guided fine needle aspiration for pancreatic masses: A prospective multicenter study. - Yoshinaga, Shigetaka; Itoi, Takao; Yamao, Kenji; Yasuda, Ichiro; Irisawa, Atsushi; Imaoka, Hiroshi; Tsuchiya, Takayoshi; Doi, Shinpei; Yamabe, Akane; Murakami, Yoshitaka; Ishikawa, Hideki; Saito, Yutaka (Digestive Endoscopy, 2020)