National Institute of Occupational Health and Poison Control;
Chinese Center for Disease Control and Prevention;
Beijing 100050;
China;
Department of Infectious Disease;
Taizhou Center for Disease Control and Prevention;
Taizhou 318000;
Zhejiang;
China;
Research Center for Occupational Safety and Health;
State Administration of Work Safety;
Beijing 102308;
China;
Department of Orthopedics and Chinese-Western Medicine;
Hunan Institute for Tuberculosis Control;
Changsha 410013;
Hunan;
China;