Funding for this research was provided by:
Japan Society for the Promotion of Science (JP16K21590)
Received: 24 July 2018
Accepted: 4 October 2018
First Online: 16 October 2018
Ethics approval and consent to participate
: The study was approved by the ethical committee of the Cancer Institute Hospital and the committee’s approval reference number is 2016–1087. Written informed consent had been obtained from the participants in the study.
: Not applicable.
: The authors declare that they have no competing interests.
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