2341-4545 2341-4545 S2341-45452022000200066 10.1159/000516946 Japan 30 04 2022 30 04 2022 29 2 66 68 1 Dutch Pancreatic Cancer Group 2017 152 6 6 540-8 2 2001 12 4 4 524-6 3 2016 3 4 4 4 2019 89 2 2 311-9