Text and Data Mining valid from 2020-01-01
Received: 29 July 2019
Accepted: 11 November 2019
First Online: 1 January 2020
Compliance with ethical standards
: The authors have declared no conflict of interest.
: All the protocols in this study were approved by the Ethics Committee of Jinzhou Medical University First Affiliated Hospital (Approval number: FM2314-124).
: Not applicable.