Funding for this research was provided by:
Natural Science Foundation of Hunan Province (2017JJ3487)
Received: 1 November 2018
Accepted: 23 December 2018
First Online: 7 January 2019
Ethics approval and consent to participate
: The study was approved by the Ethics Committee of Xiangya Hospital, Central South University. Informed consent was obtained from all individual participants included in the study.
: Informed consent was obtained from the patients for publication of this paper and any accompanying images.
: The authors declare that they have no competing interests.
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