Risk of severe COVID-19 outcomes associated with rheumatoid arthritis and phenotypic subgroups: a retrospective, comparative, multicentre cohort study

Gabriel Figueroa‐Parra, Emily Gilbert, Maria O Valenzuela-Almada, Sebastián Vallejo, Matthew R. Neville, Naomi J. Patel, Claire Cook, Xiaoqing Fu, Ramla Hagi, Gregory C McDermott, Michael A Dilorio, Lucy Masto, Kathleen M.M. Vanni, Emily Kowalski, Grace Qian, Yuqing Zhang, Zachary S. Wallace, Alí Duarte‐García, Jeffrey A. Sparks