1. Department of Cardiology, Nephrology and Endocrinology, Nordsjællands Hospital, University of Copenhagen, Denmark
2. University of Copenhagen, Rigshospitalet, Intensive Care Unit 4131, Denmark
3. Department of Nursing, Metropolitan University College, Copenhagen, Denmark
4. Department of Cardiology, Herlev and Gentofte Hospital, Herlev, Denmark
5. Department of Public Health, University of Copenhagen, Denmark