Funding for this research was provided by:
Binzhou Medical University Hospital (BY2015KJ25)
Text and Data Mining valid from 2020-03-20
Received: 12 November 2019
Accepted: 10 March 2020
First Online: 20 March 2020
Ethics approval and consent to participate
: All participants signed written informed consent in this study. The research was approved by the Ethics Committee of Binzhou Medical University Hospital.
: Written informed consent for publication was obtained from each participant.
: The authors declare that they have no competing interests.