Son, Jakyung http://orcid.org/0000-0003-1151-0017
Lee, Yujin http://orcid.org/0000-0002-6707-0471
Park, Kyong http://orcid.org/0000-0002-4681-1584
Funding for this research was provided by:
National Research Foundation of Korea (2017R1A1A3A04069759)
Article History
Received: 26 January 2018
Accepted: 26 July 2018
First Online: 1 August 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: This study was approved by the Institutional Review Board (IRB) of the Korea Centers for Disease Control and Prevention (IRB number: KU-IRB-15-EX-256-A-1), and the research procedure for the second analysis was approved by the Yeungnam University IRB (7002016-E-2016-003).
: Written informed consent was obtained from all participants.