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Bueno O, Molloy AM, Fernandez-Ballart JD, et\u00a0al. Common polymorphisms affecting folate transport to metabolism modify the effect of the MTHFR 677C&gt;T polymorphism on folate status. <i>J Nutr<\/i>. 2016;146:1\u20138.","DOI":"10.3945\/jn.115.223685"},{"key":"17","doi-asserted-by":"crossref","unstructured":"17. Hobbs CA, Cleves MA, Melnyk S, Zhao W, James SJ. Congenital heart defects and abnormal maternal biomarkers of methionine and homocysteine metabolism. <i>Am J Clin Nutr<\/i>. 2005;81:147\u2013153.","DOI":"10.1093\/ajcn\/81.1.147"},{"key":"18","doi-asserted-by":"crossref","unstructured":"18. Hobbs CA, Cleves MA, Zhao W, Melnyk S, James SJ. Congenital heart defects and maternal biomarkers of oxidative stress. <i>Am J Clin Nutr<\/i>. 2005;82:598\u2013604.","DOI":"10.1093\/ajcn\/82.3.598"},{"key":"19","doi-asserted-by":"crossref","unstructured":"19. Verkleij-Hagoort AC, Verlinde M, Ursem NT, et\u00a0al. 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