Funding for this research was provided by:
National Research Foundation of Korea (NRF-2015R1D1A3A01019577)
Article History
Received: 9 December 2017
Accepted: 11 May 2018
First Online: 19 May 2018
Compliance with ethical standards
:
: The authors have no conflicts of interest to disclosure.
: This study was approved by the Institutional Review Board of the Korean National Institute of Health for the KoGES. Written informed consent was obtained from all subjects.
: Informed consent was obtained from all individual participants included in the KoGES study.