title: [Epidemiological investigation of patients with pneumoconiosis in China Railway Fourth Group Corporation].
authors.forename: Xian-Qing
authors.initials: XQ
authors.lastname: Zhao
authors.forename: Xiu-Yang
authors.initials: XY
authors.lastname: Huang
mesh_terms: D002681:China / Q000453:epidemiology; D006801:Humans; D011009:Pneumoconiosis / Q000453:epidemiology*