Funding for this research was provided by:
National Natural Science Foundation of China (81870644)
Received: 6 December 2018
Accepted: 8 February 2019
First Online: 21 February 2019
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.: 2018–0212). We confirmed that all written consents were obtained from participants.
: Not applicable.
: The authors declare that they have no competing interests.
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