Lee, Woo Hyun
Kwon, Sung Ok
Kim, Jeong-Whun
Funding for this research was provided by:
Kangwon National University (2019-02-004)
SNUBH grant (18-2018-013)
Development Program of the National Research Foundation (NRF) funded by the Korean government (NRF-2015M3A9D7066973)
Article History
Received: 15 October 2019
Revised: 28 January 2020
Accepted: 4 March 2020
First Online: 12 March 2020
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: The need for written informed consent was waived by the institutional review board. For this type of study, formal consent is not required.