1 KAN Research Institute Inc., Minatojima-minamimachi, Chuo-ku, Kobe, Hyogo, Japan.
2 Tsukuba Research Laboratories, Eisai Co., Ltd., Tsukuba, Ibaraki, Japan.
3 Research Institute, EA Pharma Co., Ltd., Suzuki-cho, Kawasaki-ku, Kawasaki-shi, Kanagawa, Japan.
4 Medical Communication Section, Medical Division, Eisai Co., Ltd., Bunkyo-ku, Tokyo, Japan.
5 Photon Science Center of the University of Tokyo, Department of Electrical Engineering and Information System, Graduate School of Engineering, Bunkyo-ku, Tokyo, Japan.