RT Journal Article SR Electronic T1 Angiotensin-converting Enzyme 2, a SARS-CoV-2 receptor, Is Upregulated by Interleukin 6 through STAT3 Signaling in Synovial Tissues JF The Journal of Rheumatology JO J Rheumatol FD The Journal of Rheumatology SP jrheum.200547 DO 10.3899/jrheum.200547 A1 Sho Mokuda A1 Tadahiro Tokunaga A1 Junya Masumoto A1 Eiji Sugiyama YR 2020 UL http://www.jrheum.org/content/early/2020/07/27/jrheum.200547.abstract AB The severe acute respiratory syndrome-coronavirus-2 (SARS-CoV-2) has spread explosively worldwide and resulted in a pandemic of a new respiratory disease called coronavirus disease 2019 (COVID-19) in 2020. Symptoms of COVID-19 include fever, malaise, cough, and in severe cases, pneumonia and acute respiratory distress syndrome1,2.