1. Department of Neurology, Leiden University Medical Centre, Leiden, the Netherlands
2. Department of Human Genetics, Leiden University Medical Centre, Leiden, the Netherlands
3. Department of Clinical Genetics, Leiden University Medical Centre, Leiden, the Netherlands
4. Section of Gerontology and Geriatrics, Department of Internal Medicine, Leiden University Medical Centre, Leiden, the Netherlands
5. Department of Clinical Epidemiology, Leiden University Medical Centre, Leiden, the Netherlands
6. Department of Public Health and Primary Care, Leiden University Medical Centre, Leiden, the Netherlands
7. Department of Cardiology, Leiden University Medical Centre, Leiden, the Netherlands
8. German Centre for Neurodegenerative Diseases (DZNE), Bonn, Germany