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Fox TH, Elder ES, Crocker IR, Davis LW, Landry JC, Johnstone PA.Fox TH, et al. Among authors: johnstone pa.J Am Coll Radiol. 2006 Jan;3(1):38-44. doi: 10.1016/j.jacr.2005.08.019.J Am Coll Radiol. 2006.PMID: 17412005