Yang, Hui-xia
Zhong, Yu
Lv, Wei-hua
Zhang, Feng
Yu, Hong
Funding for this research was provided by:
Beijing Federation of Trade Unions (Not applicable)
Article History
Received: 26 May 2019
Accepted: 16 September 2019
First Online: 16 October 2019
Ethics approval and consent to participate
: The present study was approved by the Ethics Committee of Beijing Rehabilitation Hospital. Additionally, the written informed consent was obtained from each participant. All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: Not applicable.
: The authors declare that they have no competing interests.