KOH, K.; TEH, C.; CHEAH, C.; LING, G.; YONG, M.; HONG, H.; GUN, S. Real-world experiences of folic acid supplementation (5 versus 30 mg/week) with methotrexate in rheumatoid arthritis patients: a comparison study. Reumatismo, v. 68, n. 2, p. 90-96, 9 set. 2016.