Zhu, Rui
Xu, Xianglong
Zhao, Yong
Sharma, Manoj
Shi, Zumin
Article History
Received: 19 May 2018
Accepted: 21 October 2018
First Online: 16 November 2018
Ethics approval and consent to participate
: The study protocol has been approved by the Chongqing Medical University Ethics Committee. All the participants will sign an informed consent form. Summary data will be used only for statistical analysis to ensure that personal information is not leaked.
: The authors declare that they have no competing interests.
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