Periconceptional Use of Multivitamins and the Prevalence of Neural-Tube Defects Letter
Halsted, CH, Milunsky, A, Jick, H et al. (1990). Periconceptional Use of Multivitamins and the Prevalence of Neural-Tube Defects
. 322(15), 1082-1084. 10.1056/NEJM199004123221513