Conflict of interest
HH has received consulting fees from AstraZeneca. YK has received lecture fees from AbbVie, Eisai, Chugai, Bristol-Myers, Astellas, Mitsubishi Tanabe, Pfizer, Janssen, and UCB. TT has received grants from Abbott, Astellas, Bristol-Myers, Chugai, Daiichi Sankyo, Eisai, Mitsubishi Tanabe, Pfizer, Sanofi, Santen, Takeda, Teijin, AbbVie, Asahi Kasei, and Taisho Toyama; lecture fees from Abbott, Bristol-Myers, Chugai, Eisai, Janssen, Mitsubishi Tanabe, Pfizer, Takeda, Astellas, and Daiichi Sankyo; and consulting fees from AstraZeneca, Eli Lilly, Novartis, Mitsubishi Tanabe, Asahi Kasei, AbbVie, and Daiichi Sankyo. SS, TT, MH, and MK have no conflict of interest.