Global burden and genetic insights of RA and JIA in ages 0-19 years: GBD 2021 and MR analysis.
Rheumatoid arthritis (RA) is a chronic autoimmune arthritis that predominantly affects adults, whereas juvenile idiopathic arthritis (JIA) comprises a heterogeneous group of childhood-onset arthritides defined by age at onset, clinical phenotype, and immunological profile. Altho…