| Authors: |
Song PP; Department of Occupational Disease, University of Health and Rehabilitation Sciences (Qingdao Central Hospital) , Qingdao 266000, China., Zhang H; Department of Occupational Disease, University of Health and Rehabilitation Sciences (Qingdao Central Hospital) , Qingdao 266000, China., Sun XW; Department of Occupational Disease, University of Health and Rehabilitation Sciences (Qingdao Central Hospital) , Qingdao 266000, China., Luo LM; Department of Occupational Disease, University of Health and Rehabilitation Sciences (Qingdao Central Hospital) , Qingdao 266000, China Shandong Second Medical University, Weifang 261000, China., Zhang JJ; Department of Occupational Disease, University of Health and Rehabilitation Sciences (Qingdao Central Hospital) , Qingdao 266000, China., Han JJ; Department of Medical Administration, University of Health and Rehabilitation Sciences (Qingdao Central Hospital) , Qingdao 266000, China. |