Hardness of local water-supplies and mortality from cardiovascular disease in the County Boroughs of England and Wales.
D002318:Cardiovascular Diseases / Q000706:statistics & numerical data*; D004739:England; D006244:Hardness; D006801:Humans; D014852:Wales; D014881:Water Supply / Q000737:chemistry*
CARDIOVASCULAR DISEASES/statistics; WATER SUPPLY/chemistry