Conflict of interest
T. M. received honorarium for the lecture from AbbVie, Inc., Asahi Kasei Pharma Corp., Bristol-Myers Squibb Co., Chugai Pharmaceutical Co., Daiichi Sankyo Co., Ltd., Eisai Co., Ltd., Eli Lilly Japan Co., Janssen Pharmaceutical K.K., Mitsubishi Tanabe Pharma Co., and Takeda Pharmaceutical Co., Ltd. K. Y. received honorarium for the lecture from Janssen Pharmaceutical K.K., Mitsubishi Tanabe Pharma Co., Santen Pharmaceutical Co., Ltd. and Takeda Pharmaceutical Co., Ltd. K. I. received honorarium for the lecture and/or unrestricted research grants from AbbVie, Inc., Asahi Kasei Pharma Corp., Astellas Pharma Inc., Bristol-Myers Squibb Co., Chugai Pharmaceutical Co., Eisai Co., Ltd. Hisamitsu Pharmaceutical Co. Inc., Janssen Pharmaceutical K.K., Kaken Pharmaceutical Co. Ltd., Mitsubishi Tanabe Pharma Co., Santen Pharmaceutical Co., Ltd., Taisho Toyama Pharmaceutical Co. Ltd. and Takeda Pharmaceutical Co., Ltd. S. M. received honorarium for the lecture and/or unrestricted research grants from AbbVie, Inc., Asahi Kasei Pharma Corp., Bristol-Myers Squibb Co., Chugai Pharmaceutical Co., Daiichi Sankyo Co., Ltd., Eisai Co., Ltd., Mitsubishi Tanabe Pharma Co., Nakashima Medical Co., Ltd., Santen Pharmaceutical Co., Ltd., Taisho Toyama Pharmaceutical Co. Ltd. and Takeda Pharmaceutical Co., Ltd. The other authors declare that they have no conflicts of interest.