Lee, JungJu
Jeong, Hyunsuk
Yoon, Joo Hee
Yim, Hyeon Woo
Article History
Received: 19 February 2021
Accepted: 14 December 2021
First Online: 6 January 2022
Declarations
:
: Written informed consent was obtained from all participants when the surveys were conducted. All survey protocols were approved by the Institutional Review Board (IRB) of the Korea Centers for Disease Control and Prevention (approval nos. 2010-02CON-21-C, 2011-02CON-06-C, and 2012-01EXP-01-2C). All methods were carried out in accordance with the Declaration of Helsinki.
: Not applicable.
: The authors have no conflicts of interest to declare with respect to the content of this manuscript.