[1] Haukeland Hosp, Dept Anaesthesia & Intens Care, Bergen, Norway
[2] Univ Bergen, Dept Clin Med, Bergen, Norway
[3] Oslo Univ Hosp, Norwegian Natl Advisory Unit Trauma, Oslo, Norway
[4] Lund Univ, Div Risk Management & Societal Safety, Lund, Sweden
[5] Univ Hosp Heidelberg, Dept Anesthesiol, Heidelberg, Germany