Ning Huacheng, Zhou Yao, Zhou Ziwen, Cheng Sixiang, Huang Ruixue, Ning Huacheng, Huang Ruixue
Department of Occupational and Environmental Health, Xiangya School of Public Health, Central South University, Changsha, China.
Department of social Medicine and Health Management, Xiangya School of Public Health, Central South University, Changsha, China.
Occup Environ Med. 2017 Dec;74(12):924-925. doi: 10.1136/oemed-2017-104656. Epub 2017 Oct 12.