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Gupta A, Zegel HG, Dravid VS, Nierenberg SJ, Freiman DB.Gupta A, et al. Among authors: zegel hg.AJR Am J Roentgenol. 1997 Jan;168(1):105-8. doi: 10.2214/ajr.168.1.8976930.AJR Am J Roentgenol. 1997.PMID: 8976930