Funding for this research was provided by:
Fresenius Medical Care, Korea
Text and Data Mining valid from 2020-05-06
Received: 14 January 2020
Accepted: 27 April 2020
First Online: 6 May 2020
Ethics approval and consent to participate
: The study was conducted in accordance with the Declaration of Helsinki, and the Institutional Review Board of each participating center approved the study protocol (KHNMC IRB No. 2016–04-039). Written informed consent was obtained from all patients.
: Not applicable.
: We declare that we have no conflicts of interest.