Kim, Min Hwan
Jang, Mi
Kim, Hoguen
Lee, Woo Jung
Kang, Chang Moo
Choi, Hye Jin
Funding for this research was provided by:
Ministry of Health and Welfare (HA16C0018)
Yonsei University College of Medicine (6-2015-0053)
Article History
Received: 13 May 2018
Accepted: 24 December 2018
First Online: 2 January 2019
Compliance with ethical standards
:
: The authors declare no potential conflicts of interest.
: This study was reviewed and approved by the Institutional Review Board of Severance Hospital, Seoul, Korea (approval number: 4-2017-0542).
: Informed consent was obtained from all patients at the time of surgery for the analysis of tumor specimens used for investigations. The requirement for informed consent for the retrospective study was waived by the Institutional Review Board, because this study was performed more than 5 years after the surgery and acquisition of the tumor tissues.