Dou, Liyuan
Huang, Juan
Duncan, Polly
Guo, Lixiang
Article History
Received: 10 December 2019
Accepted: 7 May 2020
First Online: 22 June 2020
Ethics approval and consent to participate
: All the participants signed informed consents, and this study was approved by the ethics committee of People’s Hospital of Zhengzhou.
: Not applicable.
: The authors declare that they have no competing of interests.