[1] Karolinska Inst, Dept Learning Informat Management & Eth, Med Management Ctr, S-17177 Stockholm, Sweden
[2] Stockholm Cty Council, Ctr Epidemiol & Community Med CES, S-17129 Stockholm, Sweden
[3] Univ Adelaide, Sch Nursing, Adelaide, SA 5005, Australia
[4] Uppsala Univ, Univ Uppsala Hosp, Dept Med Sci, S-75185 Uppsala, Sweden
[5] Uppsala Univ, Dept Publ Hlth & Caring Sci, S-75122 Uppsala, Sweden
[6] Univ Uppsala Hosp, Dept Emergency Care, S-75185 Uppsala, Sweden