Article History
Received: 14 May 2020
Accepted: 26 May 2020
First Online: 8 June 2020
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: This study protocol was approved by the Hallym University Institutional Review Board (IRB file no. IRB FILE No. 2020-03-014-001) and adhered to the guidelines of the Declaration of Helsinki.
: Informed consent was obtained from all individual participants included in the study.