Funding for this research was provided by:
National Natural Science Foundation of China (81072279, 81673143, 30800899)
Natural Science Foundation of Shanxi Province (2015011128, 2010021234-3)
Shanxi Scholarship Council of China (2016-057)
The Schmidt Family Foundation (G-1610-56442)
The Rockefeller Brothers Foundation (17-101)
Text and Data Mining valid from 2018-12-01
Received: 9 June 2018
Accepted: 4 December 2018
First Online: 20 December 2018
Ethics approval and consent to participate
: The study is reviewed and approved by the Research Ethics Committee of Shanxi Medical University (approval no. 2013096). Signed informed consent was obtained from all participants.
: The manuscript is reviewed and approved by all authors.
: All authors declare that they have no competing financial or nonfinancial interests with regard to the research described.
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