Frequency of neural tube defects and Down syndrome in the same sibship: analysis of the Spanish ongoing case-control study.
Martínez-Frías
María Luisa
ML
Rodríguez
Laura
L
López-Grondona
Fermina
F
Bermejo
Eva
E
Rodríguez-Pinilla
Elvira
E
Frías
Jaime L
JL
D016022:Case-Control Studies; D015897:Comorbidity; D004314:Down Syndrome / Q000453:epidemiology / Q000235:genetics*; D006801:Humans; D009436:Neural Tube Defects / Q000453:epidemiology / Q000235:genetics*; D035781:Siblings; D013030:Spain / Q000453:epidemiology