Heart disease in farm workers.
D000328:Adult; D000368:Aged; D000375:Aging; D000382:Agricultural Workers' Diseases / Q000453:epidemiology*; D003327:Coronary Disease / Q000401:mortality; D006306:Health Surveys; D006331:Heart Diseases / Q000453:epidemiology*; D006801:Humans; D007196:Indiana; D008136:Longevity; D008297:Male; D008875:Middle Aged; D009658:North Dakota; D009790:Occupations; D012907:Smoking; D044465:White People