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- [42] PERICONCEPTIONAL USE OF MULTIVITAMINS AND THE PREVALENCE OF NEURAL-TUBE DEFECTS NEW ENGLAND JOURNAL OF MEDICINE, 1990, 322 (15): : 1082 - 1082
- [44] PERICONCEPTIONAL USE OF MULTIVITAMINS AND THE OCCURRENCE OF NEURAL-TUBE DEFECTS JAMA-JOURNAL OF THE AMERICAN MEDICAL ASSOCIATION, 1988, 260 (21): : 3141 - 3145