Funding for this research was provided by:
Korean Society of Nephrology (BAXTER)
Ministry of Education (2019R1A6A3A01095329)
Ministry of Education, Science and Technology (K2100400000110A0500-00710)
Received: 15 December 2020
Accepted: 30 April 2021
First Online: 15 May 2021
: The present study was conducted with the approval of the Research Ethics Committee of the Seoul National University Hospital. All procedures were performed in accordance with the ethical standards of the institutional and/or national research committee and the 1964 Helsinki Declaration and its later amendments or comparable ethical standards. The requirement to obtain informed consent was waived by the IRB due to the retrospective nature of this study.
: Not applicable.
: Drs. Yong Chul Kim, Ejin Kim, Jiyun Jung, Jae Yoon Park, Hajeong Lee, Dong Ki Kim, Yon Su Kim, Chun Soo Lim, Jung Pyo Lee, and Ho Kim declare that they have no relevant financial and non-financial conflicts of interest.