Funding for this research was provided by:
National Research Foundation of Korea (2015M3A9E6028412, 2017R1A2B2010995)
Article History
Received: 26 October 2018
Revised: 10 January 2019
Accepted: 25 January 2019
First Online: 4 March 2019
Compliance with ethical standards
:
: All authors declare that they have no conflict of interest.
: The study protocol was approved by the institutional review board at our institution, and was conducted in accordance with the approved guidelines (Seoul National University Boramae Medical Center Institutional Review Board No. 20120405/06-2012-78/118). All patients from whom tissue specimens were harvested provided informed consent.