Funding for this research was provided by:
ministry of education (NRF-2018S1A5A2A03034582)
Article History
Received: 21 June 2021
Accepted: 10 September 2021
First Online: 16 September 2021
Declarations
:
: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.
: The Ethics Committee of the Institutional Review Board of the National Rehabilitation Center in South Korea approved this study (approval number: NRC-2020-01-006) and waived the requirement for informed consent due to its retrospective design.
: The requirement for informed consent was waived due to the retrospective nature of the study.
: The requirement for informed consent was waived due to the retrospective nature of the study.