Water hardness and cardiovascular mortality. An idea that has served its purpose.
D002318:Cardiovascular Diseases / Q000453:epidemiology / Q000209:etiology / Q000401:mortality* / Q000517:prevention & control; D006244:Hardness; D006801:Humans; D012306:Risk; D014481:United States; D014880:Water Softening; D014881:Water Supply