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El-Sayed Ahmed MM, Aftab M, Singh SK, Mallidi HR, Frazier OH.El-Sayed Ahmed MM, et al. Among authors: singh sk.Ann Thorac Surg. 2014 Aug;98(2):e45-6. doi: 10.1016/j.athoracsur.2014.04.136.Ann Thorac Surg. 2014.PMID: 25087831
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