Funding for this research was provided by:
Central South University (2018zzts930)
Text and Data Mining valid from 2020-02-12
Received: 5 December 2019
Accepted: 10 January 2020
First Online: 12 February 2020
Compliance with ethical standards
: The authors wish to declare that there is no known conflict of interests associated with this publication.
: All studies included in this study got informed consent from each study participant and that each study was approved by ethics committee or institutional review board.