title: The subgroups of A in Dar es Salaam.
mesh_terms: D000017:ABO Blood-Group System / Q000235:genetics*; D000293:Adolescent; D000328:Adult; D044383:Black People; D006801:Humans; D008875:Middle Aged; D010641:Phenotype; D013636:Tanzania
chemical_list: D000017:ABO Blood-Group System