Baek, Dong Won
Lee, Yoo Jin
Kim, Hyunjeong
Ahn, Seo Yeon
Ahn, Jae Sook
Shin, Ho Jin
Lee, Won Sik
Lee, Sang Min
Song, Ik Chan
Lee, Ho Sup
Park, Sung Woo
Choi, Yunsuk
Cho, Yoon Young
Bae, Sung Hwa
Kim, Hyeoung Joon
Sohn, Sang Kyun
Moon, Joon Ho
Article History
Received: 15 March 2018
Accepted: 23 July 2018
First Online: 2 August 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: This study was approved by the Institutional Review Board of the each participating centers. All procedures performed in studies involving human participants were in accordance with the ethical standards of institutional and/or national research committees and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: Informed consent was not required for this type of study.