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Leder RA, Dunnick NR.Leder RA, et al. Among authors: dunnick nr.AJR Am J Roentgenol. 1990 Oct;155(4):713-22. doi: 10.2214/ajr.155.4.2119098.AJR Am J Roentgenol. 1990.PMID: 2119098Review.