00511nas a2200193   4500000000100000000000100001008004100002100001400043700001400057700001300071700001900084700001400103700001400117700001400131245014100145300001000286490000700296022001400303       2016                            d1 aV. Chhaya1 aS. Saxena1 aE. Cecil1 aV. Subramanian1 aV. Curcin1 aA. Majeed1 aR. Pollok00aEmerging trends and risk factors for perianal surgery in Crohn\textquoterights disease: a 20-year national population-based cohort study  a890-50 v28  a0954-691x