Funding for this research was provided by:
Japan Society for the Promotion of Science (16K10775, 17K15659)
Japan Agency for Medical Research and Development (JP17ck0106168)
Received: 2 November 2018
Accepted: 3 November 2018
First Online: 4 December 2018
Ethics approval and consent to participate
: This study was approved by the ethics committees of the National Cancer Center (2013–042) as well as the respective local institutional review boards. Consent to participate to the study was obtained whenever applicable.
: Not applicable.
: K.I. is a recipient of a research grant from Chugai Pharmaceuticals/EPS Co., Ltd., Eisai Co., Ltd., and Daiichi Sankyo Co., Ltd. for projects unrelated to this work. The authors’ declare that they have no competing interests
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