1. Faculty of Nursing; School of Health Sciences; University of Iceland; Reykjavik Iceland
2. Intensive Care Units; Landspitali - The National University Hospital 101 Reykjavik; Iceland
3. Institute of Ageing and Chronic Disease; Faculty of Health & Life Sciences; University of Liverpool; Liverpool UK
4. Faculty of Medicine; School of Health Sciences; University of Iceland; Vatnsmýrarvegur 16, 101 Reykjavík Iceland