Funding for this research was provided by:
National Science Foundation, United Arab Emirates (2018M3C9A5064708, 2014M3C7A1046042, 2014M3C7A1046049)
Ministry of Health and Welfare (HI19C0149, HI18C0630)
Received: 2 July 2020
Accepted: 6 November 2020
First Online: 19 November 2020
Ethics approval and consent to participate
: The Institutional Review Boards of Seoul National University Hospital and SMG-SNU Boramae Medical Center approved the study (1401-027-547 and 26-2015-60). This study was conducted in accordance with the recommendations of the current version of the Declaration of Helsinki. All participants and/or their legal representatives provided written informed consent.This action is appropriate.
: All authors consented for the publication of the manuscript.
: The authors declare no conflicts of interest.