Received: 29 November 2020
Accepted: 14 July 2021
First Online: 28 July 2021
: This study was approved on 10 October 2018, by the Research Ethics Review Committee of Wonju Severance Christian Hospital, Yonsei University (Approval No. CR318062). Informed consent was obtained from all individual participants included in the study.
: All those entitled to authorship are listed as authors. We also confirm that the work is original and has not been published elsewhere either partly or totally. The work is not currently being considered for publication elsewhere.
: The authors declare that they have no competing interests.