[Analysis of occurrence of 389 cases of pneumoconiosis in Tianjin in 2009].
Rui-zhi
RZ
Wang
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002681:China / Q000453:epidemiology; D006801:Humans; D008875:Middle Aged; D011009:Pneumoconiosis / Q000453:epidemiology*