[Primary prevention of neural tube defects: folic acid or levofoline acid?].
Martínez-Frías
María Luisa
ML
Rodríguez-Pinilla
Elvira
E
Mejías
Consuelo
C
Dequino
Griselda
G
D005315:Fetal Diseases / Q000517:prevention & control*; D005492:Folic Acid / Q000627:therapeutic use*; D006801:Humans; D002955:Leucovorin / Q000627:therapeutic use; D009436:Neural Tube Defects / Q000517:prevention & control*
D005492:Folic Acid; D002955:Leucovorin