Neural tube defects.
Lowry
R Brian
RB
D001955:British Columbia / Q000453:epidemiology; D005260:Female; D006801:Humans; D007198:Indians, North American; D009436:Neural Tube Defects / Q000208:ethnology*; D009864:Ontario / Q000453:epidemiology; D011247:Pregnancy; D011256:Pregnancy Outcome / Q000208:ethnology; D012306:Risk