A Communication Means for Totally Locked-in ALS Patients Based on Changes in Cerebral Blood Volume Measured with Near-Infrared Light. - Masayoshi Naito; Yohko Michioka; Kuniaki Ozawa; Yoshitoshi Ito; Masashi Kiguchi; Tsuneo Kanazawa (IEICE Trans. Inf. Syst., 2007)