1. King's College London, Institute of Psychiatry and National Institute of Health Research (NIHR) Biomedical Research Centre for Mental Health, London, UK
2. National Institute for Health Research (NIHR), Biomedical Research Centre Guy's and St. Thomas' NHS Foundation Trust and King's College London, London, UK
3. Department of Neurobiology, Care Sciences and Society, Section of Clinical Geriatrics, Karolinska Institutet, Karolinska University Hospital, Huddinge, Stockholm, Sweden
4. Department of Old Age Psychiatry & Psychotic Disorders, Medical University of Lodz, Lodz, Poland
5. Section of Gerontology and Geriatrics, Department of Clinical and Experimental Medicine, University of Perugia, Perugia, Italy
6. Department of Neurology, University of Eastern Finland and Kuopio University Hospital, Kuopio, Finland
7. Third Department of Neurology, Aristotle University of Thessaloniki, Thessaloniki, Greece
8. Department of Internal and Geriatrics Medicine, Hôpitaux de Toulouse, Toulouse, France
9. Department of Clinical Science, Intervention and Technology, Karolinska, Institutet, Stockholm, Sweden