International retrospective cohort study of neural tube defects in relation to folic acid recommendations: are the recommendations working?

Lorenzo D. Botto(University of Utah), J Goujard(Inserm), Claude Stoll, Paul Merlob(Rabin Medical Center), Alessandra Lisi, Csaba Siffel(National Center for Epidemiology), Beverley Botting(Office for National Statistics), Gioacchino Scarano(Azienda Ospedaliera G.Rummo), Pierpaolo Mastroiacovo, Annukka Ritvanen, Jon D. Erickson(Rutgers, The State University of New Jersey), Júlia Métneki(National Center for Epidemiology), R. W. Smithells(University of Leeds), Lorentz M. Irgens, Guido Cocchi(University of Bologna), Elisabeth Robert‐Gnansia, Bob McDonnell, Hermien E. K. de Walle(University of Groningen), Catherine De Vigan(Inserm), María Feijoo-Cid
BMJ
February 18, 2005
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