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Watterson KG, Malm TK, Karl TR, Mee RB.Watterson KG, et al. Among authors: karl tr.Ann Thorac Surg. 1992 Dec;54(6):1116-9. doi: 10.1016/0003-4975(92)90078-i.Ann Thorac Surg. 1992.PMID: 1449295
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Sano T, Riesenfeld T, Karl TR, Wilkinson JL.Sano T, et al. Among authors: karl tr.Circulation. 1995 Nov 1;92(9 Suppl):II272-8. doi: 10.1161/01.cir.92.9.272.Circulation. 1995.PMID: 7586423
Malm T, Pawade A, Karl TR, Mee RB.Malm T, et al. Among authors: karl tr.Scand J Thorac Cardiovasc Surg. 1993;27(2):65-70. doi: 10.3109/14017439309098693.Scand J Thorac Cardiovasc Surg. 1993.PMID: 8211007
Cochrane AD, Karl TR, Mee RB.Cochrane AD, et al. Among authors: karl tr.Ann Thorac Surg. 1993 Oct;56(4):854-61; discussion 861-2. doi: 10.1016/0003-4975(93)90343-g.Ann Thorac Surg. 1993.PMID: 8215661