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

• Hyo Geun Choi,
• Younghee Jung,
• Mihye Kwon

Affiliations

Hyo Geun Choi

4 Department of Otorhinolaryngology Head & Neck Surgery, Hallym University, Anyang-si, Korea (the Republic of)

Younghee Jung

1 Division of Infectious Diseases, Department of Internal Medicine, Hallym University Sacred Heart Hospital, Anyang, Republic of Korea

Mihye Kwon

2 Division of Rheumatology, Department of Internal Medicine, Konyang University Hospital, Daejeon, Republic of Korea