[1] Karolinska Inst, Dept Neurobiol Care Sci & Soc, Div Nursing, Box 23 300, S-14183 Huddinge, Sweden
[2] Karolinska Univ Hosp, Dept Perioperat Med & Intens Care, Stockholm, Sweden
[3] Orebro Univ, Sch Hlth Sci, Fac Med & Hlth, Orebro, Sweden
[4] Uppsala Univ, Dept Publ Hlth & Caring Sci, Uppsala, Sweden