1. Department of Nephrology, Ghent University Hospital, Ghent, Belgium
2. Department of Clinical Chemistry, Ghent University Hospital, Ghent, Belgium
3. Department of Internal Medicine, Ghent University, Ghent, Belgium
4. Department of Endocrinology, Ghent University Hospital, Ghent, Belgium
5. Department of Dermatology, Ghent University Hospital, Ghent, Belgium
6. Department of Geriatrics, Ghent University Hospital, Ghent, Belgium
7. Department of Diagnostic Sciences, Ghent University, Ghent, Belgium
8. Research Foundation Flanders, Brussels, Belgium