Ryu, Ho-Sung
Yang, Seok-Yeol
Article History
Received: 14 November 2019
Accepted: 21 February 2020
First Online: 3 March 2020
Compliance with ethical standards
:
: All authors have no actual or potential conflicts of interest including any financial, personal or other relationships with other people or organizations within 3Â years of beginning the work submitted that could inappropriately influence (bias) our work.
: 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.
: Informed consent was obtained from all individual participants included in the study.