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Ringburg AN, Polinder S, van Ierland MC, Steyerberg EW, van Lieshout EM, Patka P, van Beeck EF, Schipper IB.Ringburg AN, et al. Among authors: steyerberg ew.J Trauma. 2011 Apr;70(4):916-22. doi: 10.1097/TA.0b013e3181f6bce8.J Trauma. 2011.PMID: 21045741Free article.