Effect of different dosage and administration schedules of folic acid on blood folate levels in a population of Honduran women of reproductive age.
Rosenthal J, Milla G, Flores A, Yon M, Pfeiffer C, Umaña E, Skerrette N, Barahona F, Cooperative Folic Acid Research Group. Public Health Nutr. 2008 Aug; 11(8):822-30. Epub 2008 Apr 22.