Gomez D, Haas B, Hemmila M, Pasquale M, Goble S, Neal M, Mann NC, Meredith W, Cryer HG, Shafi S, Nathens AB. Hips can lie: impact of excluding isolated hip fractures on external benchmarking of trauma center performance. J Trauma. 2010 Nov; 69(5):1037-41.