Received: 16 January 2020
Accepted: 2 June 2020
First Online: 26 June 2020
Ethics approval and consent to participate
: This study was approved by the Ethical Committee of the First Affiliated Hospital of Zhengzhou University, ethical approval number no.2019-KY-199.
: All the results presented in this article are in aggregate form, and no personally identifiable information was used for this study.
: The authors declare that they have no competing interests.