Tumour necrosis factor inhibitors in Crohn's disease and the effect on surgery rates.

"CONFLICT OF INTEREST ME has received honoraria for lectures and consultancy from AbbVie, Merck (MSD), Takeda, Ferring, Orion Pharma, Otsuka, Tillotts, ITH, Novartis, Pfizer and Janssen, and received research funding from AbbVie and MSD. JKS has served as an external consultant to Parexel and Janssen. OO has been Principal Investigator on projects at Karolinska Institutet partly financed by investigator‐initiated grants from Janssen and Ferring, and also reports a grant from Pfizer in the context of a national safety monitoring program. None of those studies have any relation to the present study. Karolinska Institutet also has received fees for OO's lectures and participation on advisory boards from Janssen, Ferring, Takeda and Pfizer regarding topics not related to the present study. PM has received honoraria for lectures from Ferring, AbbVie and Takeda and has served as an external consultant to Janssen and AbbVie and has been Principal Investigator for a research project partly funded by Takeda. CH has received honoraria for lectures from Ferring, AbbVie, Janssen and Takeda and has served as an external consultant to Pfizer. ÅHE has worked on projects at Karolinska Institutet and SWIBREG partly financed by grants from Ferring and Jansen."

"Funding information"