Funding for this research was provided by:
National Natural Science Foundation of China (G040605)
Shenyang Science and Technology Bureau (18–400–4-10)
Text and Data Mining valid from 2019-11-27
Received: 24 July 2019
Accepted: 5 November 2019
First Online: 27 November 2019
Ethics approval and consent to participate
: The study was approved by the China Medical University ethical review board. Written informed consent was obtained from all participants included in the study.
: Not applicable.
: The authors declare no conflict of interest. The funders had no role in the design of the study; in the collection, analyses, or interpretation of data; in the writing of the manuscript, or in the decision to publish the results.