the study of the relationship between childhood leukemia and electric power line configurations in the greater denver , colorado , area by wertheimer and leeper ( am j epidemiol 109:273-284 , 1979 ) was repeated in rhode island , focusing on leukemia ( age at onset , 0-20 years ; year of onset , 1964-1978 ) .
C1332977
childhood leukemia
C0023418
focusing