1. Department of Statistics; Umeå School of Business and Economics; Umeå University; Umeå Sweden
2. Umeå Center for Functional Brain Imaging; Umeå Sweden
3. Aging and Living Condition program; Center for Population Studies; Umeå University; Umeå Sweden
4. Department of Psychology; Stockholm University; Stockholm Sweden
5. Department of Radiation Sciences and Integrative Medical Biology; Umeå University; Umeå Sweden
6. Stockholm Brain Institute; Stockholm Sweden