Funding for this research was provided by:
National Research Foundation of Korea (2015R1C1A2A01055617)
Received: 1 May 2016
Accepted: 29 January 2018
First Online: 7 February 2018
: The authors declare that they have no competing interest.
: The samples were obtained from Yonsei Cancer Center and a prior signed informed consent was obtained from each patient. It was approved by the institutional review board of Severancehospital(4–5017-550).
: Not applicable.
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