Funding for this research was provided by:
the Natural Science Foundation of Shandong Province (ZR2017MH112)
Received: 30 June 2020
Accepted: 22 January 2021
First Online: 2 February 2021
Ethics approval and consent to participate
: The study was approved by the ethics commitment of Dongying People’s Hospital.
: Current study is available from the corresponding author on reasonable request.
: The authors declare that they have no conflict of interest.