1. Center for Lifespan Changes in Brain and Cognition (LCBC), Department of Psychology University of Oslo Oslo Norway
2. Department of Radiology and Nuclear Medicine Oslo University Hospital Oslo Norway
3. Department of Biological and Medical Psychology University of Bergen Bergen Norway
4. Institute of Psychology University of Tartu Tartu Estonia
5. Department of Comparative Medicine, Michael E. Keeling Center for Comparative Medicine and Research UT MD Anderson Cancer Center Bastrop Texas USA
6. Department of Experimental Medicine University of Copenhagen Copenhagen Denmark
7. Department of Anthropology and Center for the Advanced Study of Human Paleobiology The George Washington University Washington District of Columbia USA