1. Department of Radiology, Leiden University Medical Center, Leiden, The Netherlands
2. Department of Internal Medicine, Academic Medical Center, Amsterdam, The Netherlands
3. Laboratory for Clinical Cardiovascular Physiology, Academic Medical Center, Amsterdam, The Netherlands
4. Department of Pathology, Academic Medical Center, Amsterdam, The Netherlands
5. MRC/Arthritis Research UK Centre for Musculoskeletal Ageing Research, School of Life Sciences, University of Nottingham Medical School, Nottingham, UK