New bone formation at the sacroiliac joint in axial spondyloarthritis: characterization of backfill in MRI and CT.

"Disclosure statement: T.D. reports speaker fees from Canon Medical Systems, Novartis, MSD, BIOCAD, UCB and Roche and advisory board member fees from Eli Lilly outside the submitted work. D.P. reports research support from AbbVie, Eli Lilly, MSD, Novartis and Pfizer; consulting fees from AbbVie, BIOCAD, Eli Lilly, Gilead, GlaxoSmithKline, Janssen, MSD, Moonlake, Novartis, Pfizer, Samsung Bioepis and UCB and speaker fees from AbbVie, Bristol-Myers Squibb, Eli Lilly, Janssen, MSD, Medscape, Novartis, Peervoice, Pfizer and UCB. F.P. reports grants and personal fees from Novartis, Eli Lilly and UCB and personal fees from AbbVie, Amgen, Bristol-Myers Squibb, Hexal, MSD, Pfizer and Roche, all outside the submitted work. K.Z. reports funding from the ASAS outside the submitted work. The remaining authors report no conflicts of interest."

"Funding No specific funding was received from any bodies in the public, commercial or not-for-profit sectors to carry out the work described in this article. Disclosure statement: T.D. reports speaker fees from Canon Medical Systems, Novartis, MSD, BIOCAD, UCB and Roche and advisory board member fees from Eli Lilly outside the submitted work. D.P. reports research support from AbbVie, Eli Lilly, MSD, Novartis and Pfizer; consulting fees from AbbVie, BIOCAD, Eli Lilly, Gilead, GlaxoSmithKline, Janssen, MSD, Moonlake, Novartis, Pfizer, Samsung Bioepis and UCB and speaker fees from AbbVie, Bristol-Myers Squibb, Eli Lilly, Janssen, MSD, Medscape, Novartis, Peervoice, Pfizer and UCB. F.P. reports grants and personal fees from Novartis, Eli Lilly and UCB and personal fees from AbbVie, Amgen, Bristol-Myers Squibb, Hexal, MSD, Pfizer and Roche, all outside the submitted work. K.Z. reports funding from the ASAS outside the submitted work. The remaining authors report no conflicts of interest."