Waldenlind, Kristin; Delcoigne, Bénédicte; Saevarsdottir, Saedis; Askling, Johan
(BMJ, 2020-07-15)
Objective: To investigate if autoimmune thyroid disease (AITD) impacts rheumatoid arthritis (RA) disease activity or response to methotrexate. Methods A nationwide register-based cohort study of 9 004 patients with new-onset RA from the Swedish ...