1 Department of Social Psychiatry, National Institute of Mental Health, National Center of Neurology and Psychiatry, Tokyo, Japan. ItoHiroto@ncnp.go.jp.
2 Department of Biostatistics, Kyoto University School of Public Health, Kyoto, Japan.
3 Division of Diabetic Research, Clinical Research Institute, National Hospital Organization Kyoto Medical Center, Kyoto, Japan.
4 Department of Diabetes and Metabolic Medicine, National Centre for Global Health and Medicine, Tokyo, Japan.