Received: 31 October 2020
Accepted: 8 February 2021
First Online: 22 February 2021
Ethics approval and consent to participate
: This retrospective interventional case series was approved by the Institutional Review Board (IRB) of Ajou University Medical Centre in Suwon, South Korea. This study was conducted in accordance with the tenets of the Declaration of Helsinki and the relevant guidelines and regulations by the IRB of the Ajou University Medical Centre. The need for informed consent was waived in view of the retrospective nature of the study by the IRB of Ajou University Medical Centre.
: Not applicable.
: The authors declare no competing interests regarding the publication of this paper.