Funding for this research was provided by:
National Natural Science Foundation of China (31171136)
Wuhan municipal health and family planning research fund (WX17A14)
Text and Data Mining valid from 2018-05-31
Received: 31 January 2018
Accepted: 2 May 2018
First Online: 31 May 2018
Ethics approval and consent to participate
: The institutional review board of China Resources & WISCO General Hospital approved this study.
: Informed consents for image publication were taken from all the patients.
: The authors declare that they have no competing interests.
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