Footnotes

• Handling editor Josef S Smolen

• Collaborators Société Française de Rhumatologie (SFR), Club Rhumatismes et Inflammations (CRI), Société Nationale Française de Médecine Interne (SNFMI), Groupe d’Etude Thérapeutique des Affections Inflammatoires du Tube Digestif (GETAID) and Société Française d’Endocrinologie (SFE).

• Contributors LCC, CC, LHC and COB planned and conducted the study in the USA. OL, J-EG, CR and MK conducted the study in France. MK, LCC and CC drafted the manuscript, and all the authors critically reviewed and approved the final version of the manuscript.

• Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

• Competing interests MK received speaking fees from BMS. LCC received research grant from BMS and reported consulting for Regeneron. COB has served as consultant for BMS, Regeneron and Genentech/Roche, and received grant support from BMS. CR received speaking fees from BMS, AstraZeneca and Genentech/Roche. J-EG received honoraries from BMS and Pfizer and research grant from BMS. OL received paid expert testimony and consultancy fees from BMS France, MSD and AstraZeneca, consultancy fees from Genzyme, and expert testimony for Janssen. CC and LHC declared no conflict of interest for this work.

• Patient consent for publication Not required.

• Provenance and peer review Not commissioned; externally peer reviewed.