1. Occupational and Environmental Medicine, Department of Public Health and Clinical Medicine, Umeå University, Umeå, Sweden
2. Division of Psychiatry, Department of Clinical Sciences, and
3. Department of Psychology, Umeå University, Umeå, Sweden
4. ARC (Aging Research Centre), Karolinska Institutet, Stockholm, Sweden
5. Umeå Center for Functional Brain Imaging, Umeå University, Umeå, Sweden