[Analysis of length of service with dust exposure in 56,546 patients with pneumoconiosis in Hunan province].
Yun-long
YL
Xiao
Ran-zi
RZ
Jiang
Min
M
Liu
D017668:Age of Onset; D002681:China / Q000453:epidemiology; D004391:Dust; D006801:Humans; D016273:Occupational Exposure / Q000032:analysis*; D011009:Pneumoconiosis / Q000453:epidemiology*
D004391:Dust