Elhawary , Nasser A. “Methylenetetrahydrofolate Reductase Gene and Potential Risk to Autism Spectrum Disorder”. New Horizons in Medicine and Medical Research Vol. 7 (April 23, 2022): 158–173. Accessed June 4, 2026. https://stm.bookpi.org/NHMMR-V7/article/view/6671.