[1] Emergency Med Serv, Med Grp Ensihoitopalvelu Oy, Teollisuuskuja 8, FI-21420 Lieto, Finland
[2] Ctr Prehosp Emergency Care, Emergency Med Serv, Wellbeing Serv Cty Pirkanmaa, Satakunnankatu 16, FI-33100 Tampere, Finland
[3] Univ Turku, Turku Univ Hosp, Emergency Med Serv, POB 52, FI-20521 Turku, Finland
[4] South Eastern Finland Univ Appl Sci, Dept Healthcare & Emergency Care, Paaskysentie 1, FI-48220 Kotka, Finland