Letter from the editor.
Sadler
T W
TW
D000013:Congenital Abnormalities / Q000453:epidemiology*; D004813:Epidemiology; D005492:Folic Acid / Q000009:adverse effects; D006801:Humans; D009436:Neural Tube Defects / Q000139:chemically induced; D018570:Risk Assessment
D005492:Folic Acid