Mortality and hardness of water-supplies.
D000328:Adult; D002318:Cardiovascular Diseases / Q000401:mortality*; D002561:Cerebrovascular Disorders / Q000401:mortality*; D004739:England; D006801:Humans; D007494:Ireland; D008875:Middle Aged; D009660:Northern Ireland; D012189:Retrospective Studies; D014852:Wales; D014881:Water Supply / Q000032:analysis*