¹ Department of Anesthesiology, University Hospital Zurich, Rämistrasse 100, 8091 Zurich, Switzerland

² Charles University in Prague, Faculty of Medicine in Hradec Králové, Department of Anaesthesiology and Intensive Care Medicine, University Hospital Hradec Králové, Sokolska 581, 50005 Hradec Králové, Czech Republic

³ Leicester Royal Infirmary, Accident and Emergency Department, Infirmary Square, Leicester LE1 5WW, UK

⁴ Department of Anaesthesia and Intensive Care, University of Paris XI Faculté de Médecine Paris-Sud, 63 rue Gabriel Péri, 94276 Le Kremlin-Bicêtre, France

⁵ Department of Emergency and Critical Care Medicine, University Hospital Virgen de las Nieves, ctra de Jaén s/n, 18013 Granada, Spain

⁶ Department of Anaesthesia and Intensive Care, Ospedale Maggiore, Largo Nigrisoli 2, 40100 Bologna, Italy

⁷ Department of Orthopaedic Surgery, Denver Health Medical Center, University of Colorado Medical School, 777 Bannock Street, Denver, CO 80204, USA

⁸ Departments of Haematology, Pathology and Rheumatology, Guy's & St Thomas' Foundation Trust, Lambeth Palace Road, London SE1 7EH, UK

⁹ Department of Traumatology, General and Teaching Hospital Celje, 3000 Celje, Slovenia

¹⁰ Institute for Research in Operative Medicine, University of Witten/Herdecke, Ostmerheimerstrasse 200, 51109 Köln (Merheim), Germany

¹¹ Department of Anaesthesia and Intensive Care, Université René Descartes Paris 5, AP-HP, Hopital Cochin, 27 rue du Fbg Saint-Jacques, 75014 Paris, France

¹² Department of Surgery and Trauma, Karolinska University Hospital, 171 76 Solna, Sweden

¹³ Ludwig-Boltzmann-Institute for Experimental and Clinical Traumatology, Donaueschingenstrasse 13, 1200 Vienna, Austria

¹⁴ Department of Intensive Care, Erasme Hospital, University of Brussels, Belgium, route de Lennik 808, 1070 Brussels, Belgium

¹⁵ Department of Anaesthesiology, University Hospital Aachen, Pauwelsstraße 30, 52074 Aachen, Germany