Received: 12 July 2020
Accepted: 3 November 2020
First Online: 14 January 2021
Ethics approval and consent to participate
: All experimental protocols were approved by the Institutional Review Board of the Chung-Ang University Hospital, and written informed consent was obtained from each participant and their caregiver (e.g., spouse or adult child).
: Not applicable.
: The authors declare that they have no competing interests.