[1] Eurac Res, Inst Mt Emergency Med, Viale Druso 1, I-39100 Bolzano, Italy
[2] F Tappeiner Hosp, Dept Anesthesia & Intens Care Med, Via Rossini 12, I-39012 Merano, Italy
[3] Med Univ Innsbruck, Dept Anesthesiol, Anichstr 35, A-6020 Innsbruck, Austria
[4] Med Univ Innsbruck, Dept Gen & Surg Crit Care Med, Anichstr 35, A-6020 Innsbruck, Austria
[5] Bern Univ Hosp, Dept Emergency Med, CH-3010 Bern, Switzerland
[6] Med Univ Bern, CH-3010 Bern, Switzerland