CONFLICT OF INTEREST STATEMENT
Susumu Takeuchi reports receiving personal lecture fees from Taiho Pharmaceutical Company Limited. Kaoru Kubota received honoraria for lectures and consultation fee from Taiho. Shunichi Sugawara, Takashi Hirose, Yuji Minegishi, and Akihiko Gemma received honoraria for lectures from Taiho Pharmaceutical Company. Shinji Atagi and Masahiro Seike received grant and honoraria for lectures from Taiho Pharmaceutical Company. Satoshi Teramukai, Rintaro Noro, Kei Fujikawa, Seigo Minami, Shinichiro Iida, Hiroshi Kuraishi, Tomoiki Aiba, Masaru Matsumoto, and Masaaki Kawahara declared no conflict of interest.