[1] South Carelia Social & Healthcare Dist, Lappeenranta, Finland
[2] Univ Helsinki, Dept Emergency Med & Serv, Helsinki, Finland
[3] Helsinki Univ Hosp, Helsinki, Finland
[4] LAB Univ Appl Sci, Lappeenranta, Finland
[5] Samariten Ambulance, Stockholm, Sweden
[6] Sophiahemmet Univ, Dept Hlth Promot Sci, Stockholm, Sweden
[7] Karolinska Inst, Div Nursing Stockholm, Dept Neurobiol Care Sci & Soc, Stockholm, Sweden
[8] Univ Helsinki, Fac Med, Biostat Unit, Helsinki, Finland
[9] Univ Eastern Finland, Kuopio, Finland