Institution: | 1.Department of Occupational Health, School of Public Health, Shanxi Medical University, Taiyuan, China ;2.Department of Preventive Medicine, School of Public Health, Hubei University of Medicine, Shiyan, China ;3.NHC Key Laboratory of Pneumoconiosis, Taiyuan, China ;4.General Hospital of Taiyuan Iron & Steel (Group) Co., Ltd, Taiyuan, China ; |