Shu, T. et al. 2026. The association between blood and urine heavy metal levels and the risk of rheumatoid arthritis in U.S. adults: A cross-sectional study of NHANES 2011-2020. Journal of Public Health and Preventive Medicine. 2, 7 (Jul. 2026), 1–9. DOI:https://doi.org/10.64904/20260701.