Risk of sudden death in soft water areas.
D000328:Adult; D000368:Aged; D002170:Canada; D003327:Coronary Disease / Q000401:mortality*; D003644:Death Certificates; D003645:Death, Sudden; D004781:Environmental Exposure; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D014881:Water Supply