Smoking in pregnancy.
Martínez-Frías
M L
ML
Cereijo
A
A
Rodríguez-Pinilla
E
E
D000328:Adult; D004522:Educational Status; D005260:Female; D006801:Humans; D011247:Pregnancy; D012907:Smoking / Q000453:epidemiology*; D013030:Spain / Q000453:epidemiology