Contributors
EL, SA, J-FC, and EH conceived the trial and wrote the protocol. EL, DL, JS, BS, ND, GD'H, and EH coordinated the trial in Belgium, France, UK, Germany, Australia, Netherlands, and Sweden, respectively. EL, DL, JS, ND, BS, GD'H, LP, PB, LV, PI, SV, CAL, RP, FB, MN, MF, CG, YB, and EH recruited patients and followed them up in the trial. SB-H coordinated the measurements and analysis of infliximab trough levels and antibodies to infliximab. EL and MR-R reviewed all the data. MR-R made the statistical analysis. EL, MR-R, DL, JS, J-FC and EH wrote the first drafts of the manuscript. All authors critically reviewed and validated the final version of the manuscript.