[1] Univ Iceland, Fac Nursing & Midwifery, Sch Hlth Sci, Eiriksgata 34, IS-107 Reykjavik, Iceland
[2] Natl Univ Hosp Reykjavik, Landspitali, Reykjavik, Iceland
[3] Natl Univ Hosp Reykjavik, Intens Care Unit Landspitali, Reykjavik, Iceland
[4] Natl Univ Hosp Reykjavik, Acad Chair Intens Care Nursing Landspitali, Reykjavik, Iceland
[5] Univ Iceland, Fac Nursing & Midwifery, Sch Hlth Sci, Reykjavik, Iceland