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