RT Journal Article SR Electronic T1 Severe COVID-19-associated pneumonia in 3 patients with systemic sclerosis treated with rituximab JF Annals of the Rheumatic Diseases JO Ann Rheum Dis FD BMJ Publishing Group Ltd and European League Against Rheumatism SP e37 OP e37 DO 10.1136/annrheumdis-2020-217864 VO 80 IS 3 A1 Jérôme Avouac A1 Paolo Airó A1 Nicolas Carlier A1 Marco Matucci-Cerinic A1 Yannick Allanore YR 2021 UL http://ard.bmj.com/content/80/3/e37.abstract AB