title: Factors determining the birth frequency of recessive conditions-a high frequency of classical phenylketonuria in Ireland.
mesh_terms: D005808:Genes, Recessive; D005828:Genetics, Population; D006579:Heterozygote; D006801:Humans; D007494:Ireland; D010661:Phenylketonurias / Q000453:epidemiology* / Q000235:genetics