Area differences in prevalence of neural tube malformations in South Wales. A study of possible demographic determinants.
D000367:Age Factors; D000757:Anencephaly / Q000453:epidemiology*; D005260:Female; D006801:Humans; D006849:Hydrocephalus / Q000453:epidemiology*; D007231:Infant, Newborn; D008906:Mining; D010298:Parity; D011247:Pregnancy; D044469:Racial Groups; D012923:Social Class; D016135:Spinal Dysraphism / Q000453:epidemiology*; D014852:Wales