共 9 条
- [3] Preventing neural tube defects in Europe: population based study [J]. BMJ-BRITISH MEDICAL JOURNAL, 2005, 330 (7491): : 574 - 575
- [4] GOPALAN C, 2004, NFI B, V25, P1
- [5] *GOV IND, NAT COMM POP REP
- [6] KULKARNI ML, 1987, LANCET, V1, P1260
- [7] Refsum H, 2001, AM J CLIN NUTR, V74, P233
- [8] VERMA IC, 1978, LANCET, V1, P879
- [9] XIAO KZ, 1990, INT J EPIDEMIOL, V19, P978