Funding for this research was provided by:
the 13th five years for the National Key Research and Development Program & Key Special Project (2017YFC0907400)
Text and Data Mining valid from 2018-11-29
Received: 13 October 2018
Accepted: 19 November 2018
First Online: 29 November 2018
Ethics approval and consent to participate
: This study was approved by the Ethics Committee of the First Hospital of China Medical University. Written informed consent was obtained from each subject.
: Consent for publication was obtained from each subject.
: The authors declare that they have no competing interests.
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