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Clement O, Schouman-Claeys E, Frija G.Clement O, et al. Among authors: frija g.Invest Radiol. 1990 Sep;25 Suppl 1:S61-2. doi: 10.1097/00004424-199009001-00029.Invest Radiol. 1990.PMID: 2126536No abstract available.