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van Son JA, Falk V, Mohr FW.van Son JA, et al. Among authors: mohr fw.Ann Thorac Surg. 1997 Jan;63(1):112-6.Ann Thorac Surg. 1997.Retraction in: Ann Thorac Surg. 1997 Jun;63(6):1834..PMID: 8993251Retracted.