Funding for this research was provided by:
Science and Technology research project of Henan province (22170136)
Medicine Science and Technology research project of Henan province (2018020136)
Text and Data Mining valid from 2020-02-19
Received: 16 September 2019
Accepted: 11 February 2020
First Online: 19 February 2020
Ethics approval and consent to participate
: Written informed consents were obtained from all patients, and this study conformed to the principles of the Declaration of Helsinki and was approved by the investigational review board of the First Affiliated Hospital of Zhengzhou University.
: Not applicable.
: The authors declare that they have no competing interests.