Kim, Jong Man
Kwon, Choon Hyuck David
Yoo, Heejin
Kim, Kyeung-Sik
Lee, Jisoo
Kim, Kyunga
Choi, Gyu-Seong
Joh, Jae-Won
Article History
Received: 8 January 2018
Accepted: 15 May 2018
First Online: 19 June 2018
Ethics approval and consent to participate
: This study was approved by the Samsung Medical Center Institutional Review Board (IRB) (SMC-2017-05-090). The consent of the participant was exempted through IRB.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.