1. Department of Toxicology, Shandong Academy of Occupational Health and Occupational Medicine, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, Shandong 250062, P.R. China
2. Department of Applied Chemistry, Chemical Institute of Chemical Industry, Xinjiang University of Science and Technology, Korla, Xinjiang 841000, P.R. China
3. Articular Surgery, Affiliated Hospital of Qinghai University, Xining, Qinghai 810000, P.R. China
4. Department of Respiratory Medicine, Children's Hospital Affiliated to Shandong University, Jinan, Shandong 250022, P.R. China