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Weaver SR, Blackshaw GR, Lewis WG, Edwards P, Roberts SA, Thomas GV, Allison MC.Weaver SR, et al. Among authors: roberts sa.Clin Radiol. 2004 Jun;59(6):499-504. doi: 10.1016/j.crad.2003.11.016.Clin Radiol. 2004.PMID: 15145719
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Morris-Stiff G, Escofet X, Barry JD, Lewis WG, Puntis MC, Roberts SA.Morris-Stiff G, et al. Among authors: roberts sa.Dig Surg. 2011;28(5-6):373-8. doi: 10.1159/000334546. Epub 2011 Nov 30.Dig Surg. 2011.PMID: 22134196
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Morgan MA, Lewis WG, Casbard A, Roberts SA, Adams R, Clark GW, Havard TJ, Crosby TD.Morgan MA, et al. Among authors: roberts sa.Br J Surg. 2009 Nov;96(11):1300-7. doi: 10.1002/bjs.6705.Br J Surg. 2009.PMID: 19847875