Received: 3 September 2019
Accepted: 3 December 2019
First Online: 16 December 2019
Ethics approval and consent to participate
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee (National Cancer Center Hospital Approval no. 2017–349) and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. All patients gave informed consent for strategies that were not a standard treatment, and the consent was obtained in writing.
: Not applicable.
: The authors declare that they have no competing interests.