Funding for this research was provided by:
Yeungnam University (214A480015 and 217A061038)
Article History
Received: 10 September 2018
Revised: 5 November 2018
Accepted: 19 November 2018
First Online: 24 November 2018
Compliance with ethical standards
: This is a retrospective study involving patients’ medical records and H&E slides and has been approved by the Institutional Review Board of Yeungnam University Hospital (YUMC 2017-09-030), which waived the requirement for informed consent.
: The authors declare that they have no conflict of interest.