Preconception folic acid supplementation and risk for chromosome 21 nondisjunction: A report from the National Down Syndrome Project
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Tiffany R. Oliver | Lora J. H. Bean | S. Freeman | S. Sherman | P. Romitti | C. Torfs | C. Druschel | L. O’Leary | E. Allen | C. Hobbs | S. Tinker | Marjorie H. Royle | Natasha Hollis