Funding for this research was provided by:
Ministry of Foreign Affairs (Grant HC15C1335)
Ulsan University Hospital (UUH 2020 06)
National Institute for International Education (NRF-2019R1I1A1A01059851)
Article History
Received: 25 June 2023
Accepted: 15 December 2023
First Online: 2 January 2024
Declarations
:
: This study was approved by the institutional ethics review committee of Ulsan University Hospital (approval number 2009-09-061-011). The parents or legal guardians of all participants provided written informed consent.
: Not applicable.
: The authors declare that they have no competing interests.