共 51 条
[27]
MULTIVITAMIN FOLIC-ACID SUPPLEMENTATION IN EARLY-PREGNANCY REDUCES THE PREVALENCE OF NEURAL-TUBE DEFECTS
[J].
JAMA-JOURNAL OF THE AMERICAN MEDICAL ASSOCIATION,
1989, 262 (20)
:2847-2852
[30]
PERICONCEPTIONAL USE OF MULTIVITAMINS AND THE OCCURRENCE OF NEURAL-TUBE DEFECTS
[J].
JAMA-JOURNAL OF THE AMERICAN MEDICAL ASSOCIATION,
1988, 260 (21)
:3141-3145