Funding for this research was provided by:
Natural Science Foundations of Shandong Province (ZR2017MH112)
Received: 5 August 2020
Accepted: 15 November 2020
First Online: 18 November 2020
Ethics approval and consent to participate
: This study was approved by ethics committee of Liaocheng People’s Hospital. Each patient was fully informed the contents of this study, consented to participate in this study and provided informed consents form.
: Not applicable.
: The authors declare that they have no competing interests.