RT Journal Article SR Electronic T1 Unexpected impact of COVID-19 lockdown on spinal mobility and health perception in spondyloarthritis JF Annals of the Rheumatic Diseases JO Ann Rheum Dis FD BMJ Publishing Group Ltd and European League Against Rheumatism SP 1638 OP 1640 DO 10.1136/annrheumdis-2021-220584 VO 80 IS 12 A1 Sophie De Mits A1 Ann-Sophie De Craemer A1 Liselotte Deroo A1 Thomas Renson A1 Filip E Van den Bosch A1 Philippe Carron A1 Dirk Elewaut YR 2021 UL http://ard.bmj.com/content/80/12/1638.abstract AB