[1] Fukuoka University,Department of Preventive Medicine and Public Health, Faculty of Medicine
[2] Osaka City University Graduate School of Medicine,Department of Public Health
[3] Kyushu University,Department of Preventive Medicine, Graduate School of Medical Sciences
[4] The University of Tokyo,Department of Social and Preventive Epidemiology, School of Public Health
[5] Fukuoka University,Department of Neurology, Faculty of Medicine
[6] Utano National Hospital,Department of Neurology, Clinical Research Institute
[7] Osaka City University Graduate School of Medicine,Department of Geriatrics and Neurology
[8] Kyushu University,Department of Neurology, Neurological Institute, Graduate School of Medical Sciences
[9] Kyoto University Graduate School of Medicine,Human Brain Research Center
[10] Saitama Medical University Faculty of Medicine,Department of Public Health
[11] Other members of the Study Group are listed in the Appendix,undefined