Koh, K. et al. 2016. Real-world experiences of folic acid supplementation (5 versus 30 mg/week) with methotrexate in rheumatoid arthritis patients: a comparison study. Reumatismo. 68, 2 (Sep. 2016), 90–96. DOI:https://doi.org/10.4081/reumatismo.2016.872.