Peng, Fei
Li, Yanshuang
Ai, Yanqiu
Yang, Jianjun
Wang, Yanping
Article History
Received: 17 January 2020
Accepted: 6 April 2020
First Online: 18 April 2020
Ethics approval and consent to participate
: This study was approved by the Institutional Scientific Research and Clinical Trials Ethics Committee of the First Affiliated Hospital of Zhengzhou University on June 12, 2019. This study was also registered at ExternalRef removed (ExternalRef removed). Written informed consent was obtained from all of the participants.
: Not applicable.
: The authors declare that they have no competing interests.