Funding for this research was provided by:
National Natural Science Foundation of China (8177061284)
Received: 12 November 2019
Accepted: 8 May 2020
First Online: 5 June 2020
Ethics approval and consent to participate
: The research protocol was reviewed and approved by the Ethics Committee of First Hospital of Zhengzhou University (ethical approval number: Science-2010-LW-1213), and informed consent was obtained from all participants included in the study, in agreement with institutional guidelines.
: Not applicable.
: The authors declare no potential conflicts of interest.