1. Department of Nephrology, Rigshospitalet , Copenhagen , Denmark
2. Department of Nephrology, Herlev & Gentofte Hospital , Copenhagen , Denmark
3. Department of Biomedical Sciences, University of Copenhagen , Copenhagen , Denmark
4. Department of Cardiology, Rigshospitalet , Copenhagen , Denmark
5. Department of Clinical Medicine, University of Copenhagen , Copenhagen , Denmark
6. Department of Cardiology, Herlev & Gentofte Hospital , Copenhagen , Denmark
7. Department of Clinical Biochemistry, Rigshospitalet , Copenhagen , Denmark