共 103 条
[81]
TOSI LI, 1987, CAN MED ASSOC J, V133, P255
[83]
Tulp NP, 1716, OBSERVATIONES MED
[84]
VANALLEN MI, 1993, CAN MED ASSOC J, V149, P1239
[88]
NEURAL-TUBE DEFECTS AND VITAMINS - THE NEED FOR A RANDOMIZED CLINICAL-TRIAL
[J].
BRITISH JOURNAL OF OBSTETRICS AND GYNAECOLOGY,
1984, 91 (06)
:516-523
[89]
PERICONCEPTIONAL FOLIC-ACID EXPOSURE AND RISK OF OCCURRENT NEURAL-TUBE DEFECTS
[J].
JAMA-JOURNAL OF THE AMERICAN MEDICAL ASSOCIATION,
1993, 269 (10)
:1257-1261