1. Division of Population Health Sciences (PHS), Royal College of Surgeons in Ireland; Emergency Care Research Unit (ECRU); 123 St. Stephen's Green Dublin 2 Ireland
2. London School of Hygiene & Tropical Medicine; Cochrane Injuries Group; North Courtyard Keppel Street London UK WC1E 7HT
3. London School of Hygiene & Tropical Medicine; c/o Cochrane Injuries Group; Keppel Street London UK WC1E 7HT