1. Department of Geriatrics, University Hospitals Leuven, Leuven, Belgium
2. Department of Geriatrics, Imelda Hospital, Bonheiden, Belgium
3. Centre for Metabolic Bone Diseases, University Hospitals Leuven, Leuven, Belgium
4. Department of Public Health and Primary Care, Laboratory of Gerontology and Geriatrics, KULeuven, Leuven, Belgium