1. Institute of Mental Health Academic Unit 1: Mental Health & Clinical Neurosciences School of Medicine University of Nottingham Nottingham UK
2. Laboratory of Epidemiology and Population Sciences, National Institute on Aging Baltimore Maryland USA
3. Department of Neurosciences University of California San Diego La Jolla California USA
4. Division of Biostatistics, School of Public Health and Human Longevity Science University of California San Diego La Jolla California USA
5. Icelandic Heart Association Kopavogur Iceland
6. University of Iceland Reykjavik Iceland
7. Pacific Health Research and Education Institute Honolulu Hawaii USA