1. Section of Gerontology and Geriatrics, Department of Internal Medicine, Leiden University Medical Center, Leiden, the Netherlands
2. Department of Human Genetics, Leiden University Medical Center, Leiden, the Netherlands
3. University of Applied Sciences Leiden, Leiden, the Netherlands
4. Section of Medical Statistics, Department of Medical Statistics and Bioinformatics, Leiden University Medical Center, Leiden, the Netherlands
5. Leyden Academy on Vitality and Ageing, Leiden, the Netherlands
6. Department of Clinical Laboratory Sciences, School of Medicine and Health Sciences, University for Development Studies, Tamale, Ghana
7. Laboratory of Genetics, Wageningen University, Wageningen, the Netherlands
8. Section of Molecular Epidemiology, Department of Medical Statistics and Bioinformatics, Leiden University Medical Center, Leiden, the Netherlands
9. Department of Public Health and Center of Healthy Aging, University of Copenhagen, Copenhagen, Denmark