Received: 28 December 2020
Accepted: 12 March 2021
First Online: 11 April 2021
: This retrospective study was approved by the institutional review board. The trial is registered in the University Hospital Medical Information Network Clinical Trials Registry (UMIN-CTR; number UMIN000032875). Individual patient consent was waived due to the retrospective nature of the study.
: Written informed consent was obtained from the patient for publication of this case report and any accompanying images. 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.