“Is the MTHFR C677T Variant a Genetic Risk Factor in the Etiology of Autism Spectrum Disorder? Is It Alone or by Combined With Rare Variants of the PHGDH Gene?”. Annals of Medical Research 29, no. 4 (April 29, 2022): 334–340. Accessed May 13, 2025. http://www.annalsmedres.org/index.php/aomr/article/view/4087.