Funding for this research was provided by:
the Special Funds for Projects of Independent Innovation and New and Hi-tech Industry Development of Jilin Province, China (2017C025)
Received: 14 November 2017
Accepted: 16 January 2018
First Online: 25 January 2018
Ethics approval and consent to participate
: The study protocol was approved by the Ethics Committee of the First Hospital of Jilin University, and written informed consent was obtained from all participants. (No.2010–082)
: Not applicable
: The authors declare that they have no competing interests.
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