Article History
Received: 26 November 2018
Revised: 27 January 2019
Accepted: 5 March 2019
First Online: 14 March 2019
Compliance with ethical standards
: All patients gave informed consent for retention and anonymous analysis of their tissue for research purposes in accordance with the requirements of the ethical committee of the National Defense Medical College (Approval No. 168).
: The authors declare that there is no conflict of interest.