RT Journal Article SR Electronic T1 Correspondence on ‘Interleukin-6 receptor blockade with subcutaneous tocilizumab in severe COVID-19 pneumonia and hyperinflammation: a case–control study’ by Potere et al JF Annals of the Rheumatic Diseases JO Ann Rheum Dis FD BMJ Publishing Group Ltd and European League Against Rheumatism SP e194 OP e194 DO 10.1136/annrheumdis-2020-218693 VO 81 IS 10 A1 Leo Buckley YR 2022 UL http://ard.bmj.com/content/81/10/e194.abstract AB