Funding for this research was provided by:
Korea Centers for Disease Control and Prevention (2016-E52003-00, 2016-E52003-01)
Received: 1 September 2020
Accepted: 22 December 2020
First Online: 13 January 2021
Ethics approval and consent to participate
: The study was approved by the Ethics in Human Research Committee of Chosun University Hospital (IRB No. 2013–10-001, IRB No. 2016–07-014). The adult human subjects provided written informed consent to participate in the study.
: Not applicable.
: The authors do not have any commercial interests or other associations that might pose a conflict of interest.