1. From the Department of Neuropathology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
2. Department of Neurology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
3. Department of Neurology, Neuro-Muscular Center, National Omuta Hospital, Omuta, Japan
4. Department of Neurology, Division of Respirology, Neurology and Rheumatology, Kurume University School of Medicine, Kurume, Japan
5. Department of Biochemistry, Oral Medicine Research Center, Fukuoka Dental College, Fukuoka, Japan
6. Department of Epidemiology and Public Health and Center for Cohort Studies, Graduate School of Medical Science, Kyushu University, Fukuoka, Japan