Funding for this research was provided by:
National Institutes of Health (R01NS080839, R01HD092389)
Received: 11 December 2018
Accepted: 28 May 2019
First Online: 11 June 2019
Ethics approval and consent to participate
: The study was approved by the research ethics committee of Guangdong Work Injury Rehabilitation Center. All participants gave written informed consent in accordance with the Declaration of Helsinki.
: Not applicable.
: The authors declare that they have no competing interests.