Boduroğlu, Koray, et al. “Analysis of MTHFR 1298A>C in Addition to MTHFR 677C>T Polymorphism As a Risk Factor for Neural Tube Defects in the Turkish Population”. The Turkish Journal of Pediatrics, vol. 47, no. 4, Oct. 2005, pp. 327-33, https://turkjpediatr.org/article/view/2740.