title: Blood group and socio-economic class.
mesh_terms: D000017:ABO Blood-Group System / Q000235:genetics; D005260:Female; D005787:Gene Frequency; D006801:Humans; D008297:Male; D010641:Phenotype; D012959:Socioeconomic Factors; D006113:United Kingdom
chemical_list: D000017:ABO Blood-Group System