Title {1}	Enteral versus parental nutrition after pancreaticoduodenectomy under enhanced recovery after surgery protocol; study protocol for a multicenter, open-label randomized controlled trial
Trial registration {2a and 2b}	jRCT1030210691
Protocol version {3}	Feb. 25, 2022 Version 1.0
Funding {4}	The authors received no specific grant from any funding agency in the public, commercial, or not-for-profit sector for this study
Author details {5a}	Yoshinori Takeda1, Yoshihiro Mise1, Yoji Kishi2, Hiroyuki Sugo3, Yusuke Kyoden4, Kiyoshi Hasegawa5, Yu Takahashi6, Akio Saiura1 1Department of Hepatobiliary-Pancreatic Surgery, Juntendo University School of Medicine, Hongo, Tokyo, Japan 2Department of Surgery, National Defense Medical College, Tokorozawa, Saitama, Japan 3Department of General Surgery, Juntendo University Nerima Hospital, Nerima, Tokyo, Japan 4Department of Gastrointestinal Surgery, Ibaraki Prefectural Central Hospital, Koibuchi, Kasama, Ibaraki, Japan 5Hepato-Biliary-Pancreatic Surgery Divison, Department of Surgery, Graduate School of Medicine, University of Tokyo, Bunkyo-Ku, Tokyo, Japan 6Division of Hepatobiliary and Pancreatic Surgery, Cancer Institute Hospital, Japanese Foundation for Cancer Research, Ariake, Tokyo, Japan
Name and contact information for the trial sponsor {5b}	Not applicable
Role of sponsor {5c}	Not applicable