[1] Karolinska Univ Hosp Huddinge OOH, Emergency & Reparat Med Theme, Halsovgen 13, S-14157 Stockholm, Sweden
[2] Karolinska Inst, Dept Med, Stockholm, Sweden
[3] Uppsala Univ Hosp, Dept Emergency Care & Internal Med, Uppsala, Sweden
[4] Uppsala Univ, Uppsala Univ Hosp, Dept Med Sci Clin Epidemiol, Uppsala, Sweden
[5] Uppsala Univ, Dept Publ Hlth & Caring Sci Hlth Serv Res, Uppsala, Sweden
[6] Dalarna Univ, Sch Educ Hlth & Social Studies, Falun, Sweden
[7] Karolinska Univ Hosp, Emergency & Reparat Med Theme, Stockholm, Sweden