Neural tube defects.
Wang
Fu-Lin
FL
Quan
Hude
H
Schopflocher
Donald
D
D000028:Abortion, Induced; D015982:Bias; D005260:Female; D005492:Folic Acid / Q000097:blood; D006801:Humans; D007198:Indians, North American; D009436:Neural Tube Defects / Q000208:ethnology*; D009864:Ontario / Q000453:epidemiology; D011247:Pregnancy / Q000097:blood; D011256:Pregnancy Outcome / Q000208:ethnology; D011295:Prenatal Care; D018570:Risk Assessment
D005492:Folic Acid