title: ABO blood-group distribution and heart-disease.
mesh_terms: D000017:ABO Blood-Group System; D002118:Calcium / Q000032:analysis; D003327:Coronary Disease / Q000097:blood* / Q000401:mortality; D006801:Humans; D014505:Urban Population; D014852:Wales; D014867:Water / Q000032:analysis
chemical_list: D000017:ABO Blood-Group System; D014867:Water; D002118:Calcium