Lee, Jeong Won
Son, Myoung Won
Chung, Il Kwon
Cho, Young Sin
Lee, Moon-Soo
Lee, Sang Mi http://orcid.org/0000-0002-7943-3807
Funding for this research was provided by:
Soonchunhyang University
the National Research Foundation of Korea (NRF-2017R1C1B5075905)
the National Research Foundation of Korea (NRF-2018R1C1B5040061)
Article History
Received: 28 January 2019
Accepted: 14 August 2019
First Online: 4 September 2019
Compliance with ethical standards
:
: Jeong Won Lee declares that he has no conflict of interest. Myoung Won Son declares that he has no conflict of interest. Il Kwon Chung declares that he has no conflict of interest. Young Sin Cho declares that he has no conflict of interest. Moon-Soo Lee declares that he has no conflict of interest. Sang Mi Lee declares that she has no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.
: The protocol was reviewed and approved by the local Institutional Review Board. The Institutional Review Board decided to waive the informed consent of this study because it was an observational study using retrospectively collected data.