Funding for this research was provided by:
the National Scientific Foundation Committee of China (81501491)
the National Scientific Foundation Committee of China (81571687)
Received: 8 March 2019
Accepted: 24 April 2019
First Online: 6 May 2019
Ethics approval and consent to participate
: The Ethics Committee of the institution has approved this study. Written informed consents were obtained in all patients.
: All of the authors confirmed that they agreed with the publication of our manuscript.
: The authors declare that they have no competing interests.
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