Kim, Sung-Jae
Choi, Chong Hyuk
Kim, Sung-Hwan
Lee, Su-Keon
Lee, Wonyong
Kim, Taeyup
Jung, Min
Article History
Received: 1 November 2017
Accepted: 28 February 2018
First Online: 3 March 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: This study was conducted following the approval of Institutional Review Board of Severance Hospital, Yonsei University College of Medicine (IRB number 4-2017-0303).
: This retrospective study received exemption from informed consent by the Institutional Review Board of Severance Hospital.