Funding for this research was provided by:
The National Natural Science Foundation of China (81272981)
Beijing Natural Science Foundation (7151003)
Article History
Received: 14 February 2020
Accepted: 22 April 2020
First Online: 24 May 2020
Ethics approval and consent to participate
: Not Applicable.
: Written informed consent was obtained from both of patients for publication of the cases and accompanying images.
: The authors declare that they have no competing interests.