Cha, Dong Ik
Kang, Tae Wook
Jang, Kyoung Mi
Kim, Young Kon
Kim, Seong Hyun
Ha, Sang Yun
Sohn, Insuk
Article History
First Online: 1 June 2018
Compliance with ethical standards
:
: The authors declare that no conflicts of interest are associated with this publication. The authors also declare that there are no potential conflicts (financial, professional, or personal) associated with this manuscript.
: Our Institutional Review Board (Samsung Medical Center) approved this retrospective case–control study using human participants and the requirement for informed consent was waived.