Received: 2 February 2018
Accepted: 25 June 2018
First Online: 7 July 2018
Ethics approval and consent to participate
: This study conforms to the Declaration of Helsinki. The ethics committee of the Second Affiliated Hospital of Jilin University obtained the consent of the patient who participates in this study.
: Written consent was obtained from the patient for publication of this study and accompanying images.
: The authors declare that they have no competing interests.