1. P421 Real-world effectiveness and safety of vedolizumab induction therapy for Crohn's disease in Poland – a prospective, observational POLONEZ II study considering patients reported outcomes. (30th January 2023) Authors: Liebert, A; Kłopocka, M; Cichoż-Lach, H; Michalak, A; Talar-Wojnarowska, R; Domżał-Magrowska, D; Filipiuk, A; Krogulecki, M; Kopertowska-Majchrzak, M; Eder, P; Stawczyk-Eder, K; Waszak, K; Zagórowicz, E; Wojciechowski, K; Drygała, S Journal: Journal of Crohn's and colitis Issue: Volume 17(2023)Supplement 1 Page Start: i550 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗