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Hughes D Jr, Siegel MJ.Hughes D Jr, et al. Among authors: siegel mj.Radiol Clin North Am. 2010 Jul;48(4):817-35. doi: 10.1016/j.rcl.2010.04.005. Epub 2010 Jun 11.Radiol Clin North Am. 2010.PMID: 20705175Review.