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Hecht EM, Holland AE, Israel GM, Hahn WY, Kim DC, West AB, Babb JS, Taouli B, Lee VS, Krinsky GA.Hecht EM, et al. Among authors: babb js.Radiology. 2006 May;239(2):438-47. doi: 10.1148/radiol.2392050551.Radiology. 2006.PMID: 16641353