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Hirayama T, Roberts DG, Allers M, Belboul A, al-Khaja N, Olsson GW.Hirayama T, et al. Among authors: roberts dg.Scand J Thorac Cardiovasc Surg. 1988;22(2):171-4. doi: 10.3109/14017438809105952.Scand J Thorac Cardiovasc Surg. 1988.PMID: 3406692
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