title: Methodologic issues in epidemiologic studies of congenital microcephaly.
abstract: In this methodological paper, we explore a number of issues that pose problems for those who seek the antecedents of congenital microcephaly. We pay particular attention to three concerns: Who is a case? How should cases be classified? To whom should cases be compared?
mesh_terms: D004812:Epidemiologic Methods; D005260:Female; D005317:Fetal Growth Retardation; D005865:Gestational Age; D006257:Head / Q000196:embryology / Q000254:growth & development; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D008831:Microcephaly / Q000196:embryology / Q000453:epidemiology* / Q000473:pathology