Funding for this research was provided by:
Hallym University (HURF-2015-38)
Korean Cancer Study Group and KCSG data center (ST14-11)
Minister of food and drug safety (15182MFDS512)
Text and Data Mining valid from 2018-01-25
Received: 20 November 2017
Accepted: 11 January 2018
First Online: 25 January 2018
Compliance with ethical standards
: All authors declare that they have no conflicts of interest.
: All procedures followed were in accordance with the ethical standards of the responsible committee on human experimentation (institutional and national) and with the Helsinki Declaration of 1964 and later versions. Informed consent to be included in the study, or the equivalent, was obtained from all patients.