Funding for this research was provided by:
National Natural Science Foundation of China (81772344)
Text and Data Mining valid from 2018-04-02
Received: 8 April 2017
Accepted: 7 March 2018
First Online: 2 April 2018
Ethics approval and consent to participate
: The study was approved by the Institutional Review Board (IRB) of Tongji Medical College. Each author certifies that all the investigations were conducted in conformity with ethical principles. All the patients provided written informed consent.
: We obtained a written informed consent from the patient for publication of images.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.