M. Taraborelli, L. Andreoli, S. Archetti, M. Ferrari, R. Cattaneo, and A. Tincani, “Methylenetetrahydrofolate reductase polymorphisms in methotrexate treatment of rheumatoid arthritis patients. Review of the literature and personal experience”, Reumatismo, vol. 61, no. 2, pp. 98–106, Jun. 2009.