Vedolizumab in Pediatric inflammatory bowel diseases: a retrospective multi-center experience from the paediatric IBD Porto group of ESPGHAN por Ledder, O, De Meij, T, Martín De Carpi, J, Richmond, L, Cohen, S, Bronsky, J, Shaoul, R, Levine, A, Escher, J, Deridder, L, Assa, A, Ruemmele, F, Shah, N, Wolters, V, Rodrigues, A, Uhlig, H, Urlep, D, Posovsky, C, Kolho, K, Turner, D