Cigarette smoking and geographic variation in coronary heart disease mortality in the United States.
D003327:Coronary Disease / Q000401:mortality*; D005260:Female; D005843:Geography; D006801:Humans; D008175:Lung Neoplasms / Q000401:mortality; D008297:Male; D008875:Middle Aged; D012907:Smoking; D013223:Statistics as Topic; D014481:United States; D014507:Urbanization; D014867:Water / Q000032:analysis
D014867:Water