1. Section Gerontology and Geriatrics, Department of Internal Medicine, Leiden University Medical Center, RC Leiden, The Netherlands
2. Section Endocrinology, Department of Internal Medicine, Leiden University Medical Center, RC Leiden, The Netherlands
3. Section Molecular Epidemiology, Department of Biomedical Data Sciences, Leiden University Medical Center, RC Leiden The Netherlands
4. Department of Public Health, Center of Healthy Aging, University of Copenhagen, Copenhagen, Denmark