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

Rheumatoid DisorderRheumatologyAutoimmune DiseaseRheumatic DiseasesCovid-19 PandemicRiskSevere Covid-19 OutcomesInflammatory Rheumatic DiseaseRheumatoid ArthritisCovid-19 EpidemiologyPublic HealthPhenotypic SubgroupsMedicineEpidemiologyCovid-19