Received: 27 November 2018
Accepted: 9 January 2019
First Online: 18 January 2019
Ethics approval and consent to participate
: The study was approved by the ethics committees of Hyogo Cancer Center (HCC R-377).
: Patients treated at Hyogo Cancer Center consented in writing for the use of their anonymous data for research.
: The authors declare that they have no competing interests.
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