RT Journal Article SR Electronic T1 Biologics, spondylitis and COVID-19 JF Annals of the Rheumatic Diseases JO Ann Rheum Dis FD BMJ Publishing Group Ltd and European League Against Rheumatism SP 1663 OP 1665 DO 10.1136/annrheumdis-2020-217941 VO 79 IS 12 A1 James Todd Rosenbaum A1 Hedley Hamilton A1 Dongseok Choi A1 Michael H Weisman A1 John D Reveille A1 Kevin L Winthrop YR 2020 UL http://ard.bmj.com/content/79/12/1663.abstract AB