Article History
Received: 23 August 2020
Accepted: 25 November 2020
First Online: 7 January 2021
Ethics approval and consent to participate
: This study was performed in line with the principles of the Declaration of Helsinki. The study and all its protocols were approved by the institutional review board of Ajou Medical Center (approval no. AJIRB-MED-MDB-17-254). The need for informed consent was waived by the institutional review board of our hospital due to the retrospective design of the study.
: We received the photo release consent from the all included patients and they agreed for the publication of identifying images in academic purpose.
: The authors declare that they have no competing interests.