Funding for this research was provided by:
National Natural Science Foundation of China (81470617)
Article History
Received: 5 January 2018
Accepted: 13 June 2018
First Online: 3 July 2018
Ethics approval and consent to participate
: This study was approved by the Institutional Ethical Committee of the Fourth Affiliated Hospital of China Medical University, Shenyang (No.: 2014-036). We confirm that written consent was obtained from all participants.
: Not applicable.
: The authors declare that they have no competing interests.
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