European Heart Journal, 31(4), 464-471. Oxford University Press European Heart Journal, 31, 4, pp. 464-71 van Beynum, I M, Kapusta, L, Bakker, M K, den Heijer, M, Blom, H J & de Walle, H E K 2010, ' Protective effect of periconceptional folic acid supplements on the risk of congenital heart defects: a registry-based case-control study in the northern Netherlands ', European Heart Journal, vol. 31, no. 4, pp. 464-471 . https://doi.org/10.1093/eurheartj/ehp479 European Heart Journal, 31, 464-71
Clinical Chemistry and Laboratory Medicine, 46(10), 1369-1375. Walter de Gruyter GmbH Clinical Chemistry and Laboratory Medicine, 46, 10, pp. 1369-75 Clinical Chemistry and Laboratory Medicine, 46(10), 1369-1375 Clinical Chemistry and Laboratory Medicine, 46, 1369-75 Clinical Chemistry and Laboratory Medicine 46 (2008) 10 van Beynum, I, Mooij, C, Kapusta, L, Heil, S G, den Heijer, M & Blom, H J 2008, ' Common 894G >T single nucleotide polymorphism in the gene coding for endothelial nitric oxide synthase (eNOS) and risk of congenital heart defects ', Clinical Chemistry and Laboratory Medicine, vol. 46, no. 10, pp. 1369-1375 . https://doi.org/10.1515/CCLM.2008.271