Association between previous rheumatoid arthritis and COVID-19 and its severity: a nationwide cohort study in South Korea

Objectives The prevalence of rheumatoid arthritis (RA) among patients with COVID-19 and the association between RA and the outcome of COVID-19 remain unclear. We aimed to compare the prevalence of RA between participants with and without COVID-19; we then analysed the association between the presenc...

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Bibliographic Details
Main Authors: Hyo Geun Choi, Younghee Jung, Mihye Kwon
Format: Article
Language:English
Published: BMJ Publishing Group 2021-10-01
Series:BMJ Open
Online Access:https://bmjopen.bmj.com/content/11/10/e054753.full
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