1. Department of Nephrology Copenhagen University Hospital Rigshospitalet Copenhagen Denmark
2. Department of Nephrology Copenhagen University Hospital Herlev Copenhagen Denmark
3. Department of Clinical Physiology and Nuclear Medicine, Centre for Functional and Diagnostic Imaging and Research Copenhagen University Hospital Hvidovre Copenhagen Denmark
4. Department of Biomedical Sciences and NNF Center for Basic Metabolic Research, The Panum Institute University of Copenhagen Copenhagen Denmark
5. Department of Public Health, Section of Biostatistics University of Copenhagen Copenhagen Denmark
6. Department of Clinical Medicine University of Copenhagen Copenhagen Denmark