Funding for this research was provided by:
National Natural Science Foundation of China (81872123)
Outstanding Scientific Fund of Shengjing Hospital (201601)
Text and Data Mining valid from 2019-11-14
Received: 22 June 2019
Accepted: 24 October 2019
First Online: 14 November 2019
Ethics approval and consent to participate
: This study was approved by the Ethics Committee of Shengjing Hospital of China Medical University.
: All listed authors have actively participated in the study and have read and approved the submitted manuscript.
: The authors declare that they have no competing interests.