Kang, Junho
Yoo, Changhoon
Hwang, Hee-Sang
Hong, Seung-Mo
Kim, Kyu-pyo
Kim, Sun Young
Hong, Yong-Sang
Kim, Tae Won
Ryoo, Baek-Yeol
Article History
Received: 4 November 2018
Accepted: 5 December 2018
First Online: 10 December 2018
Compliance with ethical standards
:
: The authors have no competing financial interests to declare.
: 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.
: For this type of study, formal consent is not required.