Interviewer bias and maternal bias.
Martínez-Frías
M L
ML
D015982:Bias; D016022:Case-Control Studies; D000013:Congenital Abnormalities / Q000453:epidemiology*; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D011247:Pregnancy; D013030:Spain / Q000453:epidemiology