We have read with interest the works on rhupus, a clinical condition characterized by the coexistence of rheumatoid arthritis (RA) and systemic lupus erythematosus (SLE), recently published in Lupus. 1,2 These publications prompted us to investigate the prevalence and characteristics of rhupus in our cohort of patients with SLE,3,4 fulfilling international classification criteria.
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Amaya‐Amaya et al. (2015) studied this question.
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