Competing interests
F.K. received consulting fees and honoraria from, and served on an Advisory Board for, Kyowa Kirin Co., Ltd. Y.S. and M.O. are employees of Kyowa Kirin Co., Ltd. K.N. is an employee of and holds stock or stock options in Kyowa Kirin Co., Ltd. M.F. received grants from Kyowa Kirin Co., Ltd. to his institution; consulting fees from Sanwa Kagaku Kenkyusho Co., Ltd. and Ono Pharmaceutical Co., Ltd.; and honoraria from Kyowa Kirin Co., Ltd., Bayer Yakuhin, Ltd., and Kissei Pharmaceutical Co., Ltd. T.A. received consulting fees and honoraria from Kyowa Kirin Co., Ltd., Kissei Pharmaceutical Co., Ltd., Ono Pharmaceutical Co., Ltd., Torii Pharmaceutical Co., Ltd., Astellas Pharma Inc., Bayer Yakuhin, Ltd., and Sanwa Kagaku Kenkyusho Co., Ltd.