Neural-tube defects.
Schulman
J D
JD
D019587:Dietary Supplements; D005492:Folic Acid / Q000627:therapeutic use*; D006291:Health Policy; D006801:Humans; D009436:Neural Tube Defects / Q000517:prevention & control*; D016742:Preconception Care; D016032:Randomized Controlled Trials as Topic; D013997:Time Factors; D014481:United States
D005492:Folic Acid