Funding for this research was provided by:
National Natural Science Foundation of China (81771534, 81820108016)
Key science and technology foundation of Henan Province (172102310082)
Key research projects of Henan higher education institutions (18A320057)
Received: 9 September 2019
Accepted: 14 April 2020
First Online: 29 April 2020
Ethics approval and consent to participate
: All study methods were approved by Institutional Review Board and Ethics Committee of the First Affiliated Hospital of Zhengzhou University, and were performed in accordance with relevant guidelines and regulations. All subjects enrolled in the study gave written formal consent to participate.
: Not applicable.
: The authors declare that they have no competing interests.