[1] Oslo Univ Hosp, Div Emergencies & Crit Care, Postoperat & Intens Care & Dept, POB 4950 Nydalen, N-0424 Oslo, Norway
[2] Oslo Univ Hosp, Div Emergencies & Crit Care, Dept Res & Dev, POB 4950 Nydalen, N-0424 Oslo, Norway
[3] Univ Oslo, Fac Med, Inst Clin Med, POB 1078 Blindern, NO-0316 Oslo, Norway
[4] Lovisenberg Diaconal Univ Coll, Lovisenberggt 15b, N-0456 Oslo, Norway
[5] Oslo & Akershus Univ Coll Appl Sci, Fac Nursing Sci, Dept Publ Hlth, POB 4 St Olavs Plass, N-0130 Oslo, Norway
[6] Univ Oslo, Fac Med, Inst Hlth & Soc, Dept Nursing Sci, POB 1078 Blindern, NO-0316 Oslo, Norway