1. Ageing populations: the challenges ahead;Christensen;Lancet,2009
2. Trends in the health of the elderly;Crimmins;Annu Rev Public Health,2004
3. Mortality in severely injured elderly trauma patients—when does age become a risk factor?;Kuhne;World J Surg,2005
4. NTDB data points: older and thinner;Fantus;Bull Am Coll Surg,2010
5. The Injury Severity Score: a method for describing patients with multiple injuries and evaluating emergency care;Baker;J Trauma,1974