Kocak, N., F. Ozen, M. Ejder Yildirim, and O. Ozdemir. “The C677t and A1298c Polymorphisms of Methylenetetrahydrofolate Reductase (Mthfr) Gene”. Annals of Medical Research, vol. 16, no. 3, May 2021, pp. 0157-61, http://annalsmedres.org/index.php/aomr/article/view/3433.