Jun Tsugawa¹, Kimiya Sakamoto², Sho Takeshita¹, Sachiko Shirakawa¹, Toshio Higashi², Yoshio Tsuboi³ (1.Department of Neurology, Fukuoka University Chikushi Hospital, Japan, 2.Department of Neurosurgery, Fukuoka University Chikushi Hospital, Japan, 3.Department of Neurology Fukuoka University School of Medicine, Japan)

Nobue K. Iwata¹, Hirotaka Maekawa¹, Yuto Sakai¹, Yoko Tsuboyama¹, Akihiko Mitsutake¹, Hiroki Mizukami² (1.Department of Neurology, International University of Health and Welfare, Mita Hospital, Japan, 2.Department of Pathology and Molecular Medicine, Hirosaki University Graduate School of Medicine, Japan)

Fumitaka Shimizu¹, Ryota Sato¹, Yoichi Mizukami², Kenji Watanabe², Sonoko Misawa³, Naoko Matsui⁴, Yukio Takeshita¹, Toshihiko Maeda¹, Yuishin Izumi⁴, Satoshi Kuwabara³, Takashi Kanda¹ (1.Department of Neurology and Clinical Neuroscience, Yamaguchi University Graduate School of Medicine, Japan, 2.Center for Gene Research, Yamaguchi University, Japan, 3.Department of Neurology, Graduate School of Medicine, Chiba University, Japan, 4.Department of Neurology, Tokushima University Graduate School of Medicine, Japan)

Kazunori Sango, Yuki Takezawa, Shizuka Takaku (Diabetic Neuropathy Project, Tokyo Metropolitan Institute of Medical Science, Japan)

Theerawat Kumutpongpanich, Jiraporn Jitprapaikulsan, Weerawat Saengphatrachai, Kanokwan Boonyapisit (Division of Neurology, Department of Internal Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand)