1. Department of Psychology, University of California, Riverside, CA, USA
2. Department of Psychology, Indiana University Southeast, New Albany, IN, USA
3. Institute for Gerontology, Jönköping University, Jönköping, Sweden
4. Department of Neurology, University of Southern California, Los Angeles, CA, USA
5. Department of Human Development and Family Sciences, The University of Texas at Austin, Austin, TX, USA
6. Department of Psychology, University of Edinburgh, UK
7. Centre for Cognitive Ageing and Cognitive Epidemiology, The University of Edinburgh
8. Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden