Water hardness, cardiovascular disease, and nitrate intake.
D000818:Animals; D003327:Coronary Disease / Q000401:mortality*; D006244:Hardness; D006801:Humans; D009566:Nitrates / Q000378:metabolism; D009573:Nitrites / Q000378:metabolism; D014881:Water Supply
D009566:Nitrates; D009573:Nitrites