RT Journal Article SR Electronic T1 Challenges to improving occupational health in China JF Occupational and Environmental Medicine JO Occup Environ Med FD BMJ Publishing Group Ltd SP oemed-2017-104656 DO 10.1136/oemed-2017-104656 A1 Huacheng Ning A1 Yao Zhou A1 Ziwen Zhou A1 Sixiang Cheng A1 Ruixue Huang A1 Huacheng Ning A1 Ruixue Huang YR 2017 UL http://oem.bmj.com/content/early/2017/10/12/oemed-2017-104656.abstract AB