1. Research group for lifespan changes in brain and cognition, Department of Psychology, University of Oslo, 0317 Oslo, Norway
2. Department of Physical medicine and rehabilitation, Unit of Neuropsychology, Oslo University Hospital, 0424 Oslo, Norway,
3. Department of Psychology, University of Oslo, 0317 Oslo, Norway
4. Department of Biological and Medical Psychology, Faculty of Psychology, University of Bergen, 5020 Bergen, Norway
5. Division for Mental Health and Addiction, Oslo University Hospital, 0424 Oslo, Norway
6. Department of Psychology and Institute of Gerontology, Wayne State University, Detroit, MI 48202, USA
7. Multimodal Imaging Laboratory and
8. Department of Radiology and
9. Department of Neurosciences, University of California, San Diego, La Jolla, CA 92093, USA