Cho, Geum Joon
Ouh, Yung-Taek
Kim, Log Young
Lee, Tae-Seon
Park, Geun U.
Ahn, Ki Hoon
Hong, Soon-Cheol
Oh, Min-Jeong
Kim, Hai-Joong
Article History
Received: 22 May 2016
Accepted: 23 April 2018
First Online: 3 July 2018
Ethics approval and consent to participate
: This study was approved by the Institutional Review Boards of Korea University Medical Center (KUGH16339). The IRB waived the requirements to obtain informed consent.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.