1Department of Preliminary Medicine, Seoul National University College of Medicine, Seoul, Korea
2Department of Medical Education and Neurology, Kosin University College of Medicine, Busan, Korea
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Conflicts of interest
No potential conflict of interest relevant to this article was reported.
Funding
None.
Author contributions
Conceptualization: HS, MJK. Writing - original draft: HS. Writing - review & editing: MJK.