1. London School of Hygiene & Tropical Medicine; Cochrane Injuries Group; North Courtyard Keppel Street London UK WC1E 7HT
2. National Institute for Health and Clinical Excellence; Level 1A, City Tower, Piccadilly Plaza Manchester UK M1 4BD
3. University of Hertfordshire; Centre for Research in Primary and Community Care; College Lane Hatfield Hertfordshire UK AL10 9AB
4. London School of Hygiene & Tropical Medicine; c/o Cochrane Injuries Group; Keppel Street London UK WC1E 7HT