[Investigation of the incidence of delayed silicosis in 2 mines with different contents of free silica].
D000328:Adult; D002681:China; D003300:Copper; D004391:Dust / Q000032:analysis*; D006046:Gold; D006801:Humans; D008875:Middle Aged; D008906:Mining; D012822:Silicon Dioxide / Q000032:analysis*; D012829:Silicosis / Q000453:epidemiology*; D014397:Tuberculosis, Pulmonary / Q000453:epidemiology
D004391:Dust; D006046:Gold; D012822:Silicon Dioxide; D003300:Copper