title: Letter: Unsuitability of blood-donors for population genetics.
mesh_terms: D001782:Blood Donors; D005260:Female; D005828:Genetics, Population; D006801:Humans; D008297:Male; D009664:Norway; D012204:Rh-Hr Blood-Group System; D012737:Sex Factors; D012744:Sex Ratio; D013548:Sweden; D006113:United Kingdom
chemical_list: D012204:Rh-Hr Blood-Group System