to determine whether histologic patterns differed in the high- and low-lung cancer mortality parishes ( counties ) of louisiana and whether the findings in the state differed from those in other parts of the united states , we studied the available histopathologic materials for 272 persons of the 815 who died of lung cancer in ten southern , nonurban louisiana parishes during a seven-year period from 1971-1977 .
C0041703
united states
C0024024
louisiana