^○Ikuko Aiba¹, Yuichi Hayashi², Takayoshi Shimohata², Mari Yoshida³, Koichi Wakabayashi⁴, Takashi Komori⁵, Yuko Saito⁶, Takeshi Ikeuchi⁷, Masato Hasegawa⁸, Kenji Nakashima⁹, J-VAC study group¹ (1.Department of Neurology, National Hospital Organization Higashinagoya National Hospital, Japan, 2.Department of Neurology, Gifu University Graduate School of Medicine, 3.Institute for Medical Science of Aging, Aichi Medical University, 4.Department of Neuropathology, Hirosaki University Graduate School of Medicine, 5.Department of Laboratory Medicine and Pathology, Tokyo Metropolitan Neurological Hospital, 6.Department of Neuropathology (the Brain Bank for Aging Research), 7.Niigata University, Brain Research Institute, Department of Molecular Genetics, 8.Department of Brain and Neurosciences Tokyo Metropolitan Institute of Medical Science, 9.National Hospital Organization Matsue Medical Center)