Funding for this research was provided by:
the Fundamental Research Funds for the Central Universities (YG1805038, 021414380397)
Received: 20 September 2018
Accepted: 11 February 2019
First Online: 26 February 2019
Ethics approval and consent to participate
: This study was performed with the approval of Medical Ethics Committee of Drum Tower Hospital Affiliated to Nanjing University Medical College.
: Not applicable.
: The authors declare that they have no competing interests.
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