Funding for this research was provided by:
Natural Science Foundation of Hainan Province (No. 2018JJ3844)
Scientific Research Project of Health and Family Planning Commission of Hunan Province, China (No. B2019188)
the Youth Science Foundation of Xiangya Hospital Central South University (No. 2017Q07)
the Postdoctoral Research Program of Xiangya Hospital Central South University (No. 223551)
Text and Data Mining valid from 2020-02-14
Received: 4 May 2019
Accepted: 3 February 2020
First Online: 14 February 2020
Ethics approval and consent to participate
: Not applicable.
: The authors have obtained the patient’s written informed consent of his personal clinical data and all images in this study for print and electronic publication.
: The authors have no competing interests.