Funding for this research was provided by:
Ministry of Science and Technology (2016YFC1201805)
National Natural Science Foundation of China (31571045, 81470445, 31371253)
Text and Data Mining valid from 2018-07-05
Received: 22 January 2018
Accepted: 11 June 2018
First Online: 5 July 2018
Ethics approval and consent to participate
: The study protocol was approved by the Review Board of the Second Xiangya Hospital of the Central South University in China with written, informed consent from each study participant to participate in this study.
: Written informed consent for publication was obtained from the participants. The participant whose images were included in this manuscript consented for them to be published.
: The authors declare that they have no competing interests.
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