RT Journal Article SR Electronic T1 SARS-CoV-2 antibody response after COVID-19 in patients with rheumatic disease JF Annals of the Rheumatic Diseases JO Ann Rheum Dis FD BMJ Publishing Group Ltd and European League Against Rheumatism SP 817 OP 819 DO 10.1136/annrheumdis-2020-219808 VO 80 IS 6 A1 Kristin M D’Silva A1 Naomi Serling-Boyd A1 Tiffany Y-T Hsu A1 Jeffrey A Sparks A1 Zachary S Wallace YR 2021 UL http://ard.bmj.com/content/80/6/817.abstract AB