School of Knowledge Science, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi, Ishikawa, Japan. thangbn@jaist.ac.jp.|School of Knowledge Science, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi, Ishikawa, Japan. bao@jaist.ac.jp.|Graduate School of Medicine, Chiba University, 1-8-1 Inohahan, Chuo-ku, Chiba, Japan. kandat-cib@umin.ac.jp.