Acknowledgements
We thank Mr. Shunichi Furue for his great effort on the study. This work was supported by a Japanese Ministry of Education, Culture, Sports, Science, and Technology grant-in-aid for scientific research (15H04965). The funder had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.
Conflict of interest
K.Y. has received speakers bureau from Eisai, AbbVie, Astellas, Mochida, Hisamitsu, Bristol-Meyers, Takeda and Ayumi. K.I. has received speakers bureau from AbbVie, Astellas, Ayumi, Bristol-Meyers, Chugai, Daiichi Sankyo, Janssen Pharmaceutical, Lilly, Pfizer, Takeda, Tanabe-Mitsubishi and UCB.