1. Institute of Behavioural SciencesUniversity of Helsinki Finland
2. Unit of Psychology, Faculty of EducationUniversity of Oulu Finland
3. MRC Integrative Epidemiology Unit, UK Centre for Tobacco and Alcohol Studies, and School of Experimental PsychologyUniversity of Bristol UK
4. Finnish Institute of Occupational Health, Helsinki Finland
5. Department of Epidemiology and Public HealthUniversity College London UK
6. Department of Public Health, Faculty of MedicineUniversity of Helsinki Finland
7. Centre for Cognitive Ageing and Cognitive EpidemiologyUniversity of Edinburgh UK
8. Alzheimer Scotland Dementia Research CentreUniversity of Edinburgh UK