title: A family study of major central nervous system malformations in South Wales.
mesh_terms: D000328:Adult; D000757:Anencephaly / Q000453:epidemiology / Q000235:genetics*; D001722:Birth Order; D001789:Blood Group Antigens; D002648:Child; D002675:Child, Preschool; D003241:Consanguinity; D004200:Diseases in Twins; D005260:Female; D006801:Humans; D006849:Hydrocephalus / Q000453:epidemiology / Q000235:genetics*; D007231:Infant, Newborn; D008297:Male; D008423:Maternal Age; D012744:Sex Ratio; D016135:Spinal Dysraphism / Q000453:epidemiology / Q000235:genetics*; D014852:Wales
chemical_list: D001789:Blood Group Antigens