Received: 30 April 2020
Accepted: 19 August 2020
First Online: 27 August 2020
Ethics approval and consent to participate
: The study was approved by the ethics committee of China-Japan Friendship Hospital (2020–21-K16).
: Both of the patients gave written consent for their personal or clinical details along with any identifying images to be published in this study. A copy of the written consent is available for review by the Editor-in-Chief of this journal.
: The authors declare that they have no competing interests.