Funding for this research was provided by:
Ministry of Trade, Industry and Energy (20007058)
Chung-Ang University (2021)
National Research Foundation of Korea (2021R1A4A3030268)
Received: 3 March 2021
Accepted: 23 August 2021
First Online: 30 August 2021
: This study was approved by the Chung-ang University Institutional Review Board, and all procedures were conducted in accordance with the approved study protocol. All the participants provided written informed consent before participation, and the nature and possible consequences of the study were explained to them thereafter.
: Written informed consent for publication was obtained from the participants.
: There are no competing interests to declare.