Allen J Wilcox, Rolv Terje Lie, Kari Solvoll, Jack Taylor, D Robert McConnaughey, Frank Åbyholm et al
Wilcox A J, Lie R T, Solvoll K, Taylor J, McConnaughey D R, Ã
byholm F et al.
Folic acid supplements and risk of facial clefts: national population based case-control study
BMJ 2007; 334 :464
doi:10.1136/bmj.39079.618287.0B