Funding for this research was provided by:
National R&D Program for Cancer Control, Ministry for Health and Welfare, Republic of Korea (1420020)
Received: 30 October 2017
Accepted: 30 April 2018
First Online: 8 May 2018
Ethics approval and consent to participate
: Ethics approval was obtained from the Institutional Review Board of the Seoul National University Hospital (IRB approval No. 1610–027-797). The human origin specimens used in the current study were retrieved from the Brain Bank of the Department of Neurosurgery, SNUH with IRB approval. The Brain Bank accrued the human tissues with informed consents for future research purposes under a separate IRB approval (IRB approval No. 0507–509-153).
: The authors disclose no potential conflicts of interest.
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