Liang, Jun
Xing, Huimin
Chang, Yali
Article History
Received: 19 August 2019
Accepted: 25 September 2019
First Online: 22 October 2019
Ethics approval and consent to participate
: The study was approved by the Medical Ethic Committee of the Third Hospital of Hebei Medical University.
: Not applicable.
: The authors declare that they have no competing interests.