1.Kondo, A, Kamihira, O & Ozawa, H (2009) Neural tube defects: prevalence, etiology and prevention. Int J Urol 16, 49–57.
2.Yi, Y, Lindemann, M, Colligs, Aet al. (2011) Economic burden of neural tube defects and impact of prevention with folic acid: a literature review. Eur J Pediatr 170, 1391–1400.
3.Greene, ND & Copp, AJ (2009) Development of the vertebrate central nervous system: formation of the neural tube. Prenat Diagn 29, 303–311.
5.Mohangoo, AD, van der Pal-de Bruin, KM & Buitendijk, SE (2010) Aangeboren afwijkingen in Nederland 1997–2008. Gebaseerd op de landelijke verloskunde en neonatale registraties (Congenital Anomalies in the Netherlands 1997–2008, Based On the National Obstetrical and Neonatal Registries). Report no. KvL/P&Z 2010.090. Leiden: Netherlands Organisation for Applied Scientific Research TNO.
6.MRC Vitamin Study Research Group (1991) Prevention of neural tube defects: results of the Medical Research Council Vitamin Study. Lancet 338, 131–137.
7.Czeizel, AE, Dudas, I & Metneki, J (1994) Pregnancy outcomes in a randomised controlled trial of periconceptional multivitamin supplementation. Final report. Arch Gynecol Obstet 255, 131–139.
8.De-Regil, LM, Fernandez-Gaxiola, AC, Dowswell, Tet al. (2010) Effects and safety of periconceptional folate supplementation for preventing birth defects. Cochrane Database Syst Rev issue 10, CD007950.
9.Voorlichtingsbureau voor de voeding (1994) Prevention of Neural Tube Defects by Supplementation of Folic Acid. The Hague: Preventiefonds.
10.de Walle, HE & de Jong-Van den Berg, LT (2008) Ten years after the Dutch public health campaign on folic acid: the continuing challenge. Eur J Clin Pharmacol 64, 539–543.
11.Sikkens, JJ, van Eijsden, M, Bonsel, GJet al. (2011) Validation of self-reported folic acid use in a multiethnic population: results of the Amsterdam Born Children and their Development study. Public Health Nutr 14, 2022–2028.
12.Timmermans, S, Jaddoe, VW, Mackenbach, JPet al. (2008) Determinants of folic acid use in early pregnancy in a multi-ethnic urban population in The Netherlands: The Generation R study. Prev Med 47, 427–432.
13.European Surveillance of Congenital Anomalies, EUROCAT (2009) Special Report: Prevention of Neural Tube Defects by Periconceptional Folic Acid Supplementation in Europe. Belfast: EUROCAT Central Registry, University of Ulster.
14.Barbour, RS, Macleod, M, Mires, Get al. (2012) Uptake of folic acid supplements before and during pregnancy: focus group analysis of women's views and experiences. J Hum Nutr Diet 25, 140–147.
15.de Jong-Van den Berg, LT, Hernandez-Diaz, S, Werler, MMet al. (2005) Trends and predictors of folic acid awareness and periconceptional use in pregnant women. Am J Obstet Gynecol 192, 121–128.
16.McGuire, M, Cleary, B, Sahm, Let al. (2010) Prevalence and predictors of periconceptional folic acid uptake – prospective cohort study in an Irish urban obstetric population. Hum Reprod 25, 535–543.
17.Ray, JG, Singh, G & Burrows, RF (2004) Evidence for suboptimal use of periconceptional folic acid supplements globally. BJOG 111, 399–408.
18.Stockley, L & Lund, V (2008) Use of folic acid supplements, particularly by low-income and young women: a series of systematic reviews to inform public health policy in the UK. Public Health Nutr 11, 807–821.
19.Van Vree, F, Van der Kemp, S & Foets, M (2003) Foliumzuurgebruik en gezond gedrag bij zwangerschap (Folic Acid Use and Health Behaviour during Pregnancy). Report no. B2581. Leiden: Research voor Beleid.
20.Manniën, J, Klomp, T, Wiegers, Tet al. (2012) Evaluation of primary care midwifery in The Netherlands: design and rationale of a dynamic cohort study (DELIVER). BMC Health Serv Res 12, 69.
22.Botto, LD, Lisi, A, Robert-Gnansia, Eet al. (2005) International retrospective cohort study of neural tube defects in relation to folic acid recommendations: are the recommendations working? BMJ 330, 571.
23.de Walle, HE, van der Pal, KM, de Jong-Van den Berg, LTet al. (1999) Effect of mass media campaign to reduce socioeconomic differences in women's awareness and behaviour concerning use of folic acid: cross sectional study. BMJ 319, 291–292.
24.Berry, RJ, Bailey, L, Mulinare, Jet al. (2010) Fortification of flour with folic acid. Food Nutr Bull 31, Suppl. 1, S22–S35.
26.Blencowe, H, Cousens, S, Modell, Bet al. (2010) Folic acid to reduce neonatal mortality from neural tube disorders. Int J Epidemiol 39, Suppl. 1, i110–i121.
27.European Surveillance of Congenital Anomalies, EUROCAT (2010) EUROCAT Statistical Monitoring Report – 2010. Belfast: EUROCAT Central Registry, University of Ulster.
28.Health Council of the Netherlands (2000) Risico's van foliumzuurverrijking (Risks of Fortification with Folic Acid). Report no. 2000/21. The Hague: Health Council of the Netherlands.
29.Scientific Advisory Committee on Nutrition (2006) Folate and Disease Prevention. London: The Stationery Office.
30.Winkels, RM, Brouwer, IA, Clarke, Ret al. (2008) Bread cofortified with folic acid and vitamin B-12 improves the folate and vitamin B-12 status of healthy older people: a randomized controlled trial. Am J Clin Nutr 88, 348–355.
31.Mills, JL, Carter, TC, Scott, JMet al. (2011) Do high blood folate concentrations exacerbate metabolic abnormalities in people with low vitamin B-12 status? Am J Clin Nutr 94, 495–500.
32.Health Council of the Netherlands (2008) Naar een optimal gebruik van foliumzuur (Towards An Optimal Use of Folic Acid). Report no. 2008/02. The Hague: Health Council of the Netherlands.
34.Fruzzetti, F (2012) Beyaz®: an oral contraceptive fortified with folate. Womens Health 8, 13–19.
35.Picavet, C, van der Leest, L & van der Vlugt, I (2011) Contraceptive Decision-Making: Background and Outcomes of Contraceptive Methods. Utrecht: Rutgers FPW.