1 Warwick Clinical Trials Unit, Warwick Medical School, University of Warwick, Coventry CV4 7AL, UK; University Hospitals Birmingham, Birmingham B9 5SS, UK. Electronic address: g.d.perkins@warwick.ac.uk.
2 University Hospital Schleswig-Holstein, Institute for Emergency Medicine, Kiel, Germany.
3 Department of Anaesthesia, Intensive Care and Emergency Medical Services, Maggiore Hospital, Bologna, Italy.
4 Department of Anesthesiology, Oslo University Hospital and Institute of Clinical Medicine, University of Oslo, Norway.
6 Department of Anesthesiology, University Medical Center, Johannes Gutenberg-University Mainz, Germany.
7 Department of Emergency Medicine, Faculty of Medicine Ghent University, Ghent, Belgium; EMS Dispatch Center, East-West Flanders, Federal Department of Health, Belgium.
8 Department of Neonatology, University Hospitals Plymouth, Plymouth, UK.
9 Thames Valley Air Ambulance, Stokenchurch, UK.
10 National and Kapodistrian University of Athens Medical School, Athens, Greece.
11 University of Antwerp, Antwerp, Belgium.
12 Department of Anaesthesiology and Pain Medicine, Bern University Hospital, University of Bern, Bern, Switzerland; School of Medicine, Sigmund Freud University Vienna, Vienna, Austria.
13 Department of Emergency Medicine, Antwerp University Hospital and University of Antwerp, Belgium.
14 Akureyri Hospital, Akureyri, Iceland; University of Akureyri, Akureyri, Iceland.
15 Warwick Clinical Trials Unit, Warwick Medical School, University of Warwick, Coventry CV4 7AL, UK; Royal United Hospital, Bath BA1 3NG, UK.