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

Lorenzo D. Botto(Centers for Disease Control and Prevention), J Goujard(Inserm), Claude Stoll(Génétique Médicale & Génomique Fonctionelle), Paul Merlob(Rabin Medical Center), Alessandra Lisi, Csaba Siffel(Augusta University Health), Beverley Botting(Office for National Statistics), Gioacchino Scarano(Azienda Ospedaliera G.Rummo), Pierpaolo Mastroiacovo(National Center on Birth Defects and Developmental Disabilities), Annukka Ritvanen, Jon D. Erickson(National Center on Birth Defects and Developmental Disabilities), 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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