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  • Additional file 1 of Symptoms in first-degree relatives of patients with rheumatoid arthritis: evaluation of cross-sectional data from the symptoms in persons at risk of rheumatoid arthritis (SPARRA) questionnaire in the PRe-clinical EValuation of Novel Targets in RA (PREVeNT-RA) Cohort. (2021) Costello, Ruth E.; Humphreys, J. H.; Sergeant, J. C.; Haris, M.; Stirling, F.; Raza, K.; van Schaardenburg, D.; Bruce, Ian N.