Funding for this research was provided by:
Soonchunhyang University (Not applicable)
National Research Foundation of Korea (NRF-2018R1C1B5045312)
Article History
Received: 7 July 2018
Accepted: 15 September 2018
First Online: 8 October 2018
Compliance with ethical guidelines
:
: J.-Y. Lee, K. Im and K.-Y. Kwon declare that they have no competing interests.
: 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 1975 Helsinki declaration and its later amendments or comparable ethical standards. Informed consent was obtained from the patient included in the study.