Xu, Haifeng
Pang, Jianfei
Yang, Xi
Li, Mei
Zhao, Dongsheng
Article History
First Online: 9 July 2020
Ethics approval and consent to participate
: This study was approved by the Ethics Committee of General Hospital of Xinjiang Military Region. The informed consent of human participants was obtained in oral format because this study was a secondary analysis of fully anonymized data.
: Not applicable.
: The authors declare that they have no competing interests.