Funding for this research was provided by:
Eisai Co., Ltd., Japan
Received: 8 April 2019
Accepted: 9 October 2019
First Online: 12 December 2019
Compliance with ethical standards
: The study was conducted in accordance with the International Conference on Harmonization Guidelines for Good Clinical Practice, the Declaration of Helsinki, and the institutional review board/ethics committee at each site.
: The sponsor played a role in designing the study, interpreting the data, and reviewing the draft manuscripts.
: The authors declare that they have no conflict of interest.
: The study was approved by the institutional ethical committee and the patient signed an informed consent to participate in the study.