1. Department of Psychogeriatrics, National Institute of Mental Health, National Centre of Neurology and Psychiatry, Tokyo, Japan,
2. University of Primorska, Primorska Institute of Natural Sciences and Technology, Koper, Slovenia
3. Centre for Suicide Prevention, National Institute of Mental Health, National Centre of Neurology and Psychiatry, Tokyo, Japan
4. Department of Psychogeriatrics, National Institute of Mental Health, National Centre of Neurology and Psychiatry, Tokyo, Japan