International retrospective cohort study of neural tube defects in relation to folic acid recommendations: are the recommendations working?
Botto, L.; Lisi, A.; Robert-Gnansia, E.; Erickson, J. D.; Vollset, S.; Mastroiacovo, P.; Ritvanen, A.; et al. (2005)
Botto, L.
Lisi, A.
Robert-Gnansia, E.
Erickson, J. D.
Vollset, S.
Mastroiacovo, P.
Ritvanen, A.
et al.
2005
BMJ : British Medical Association : (published 18 February 2005)
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