Moraca RJ, Wanamaker KM, Bailey SH, McGregor WE, Benckart DH, Maher TD, Magovern GJ Jr. J Card Surg. 2011 Mar;26(2):135-43. doi: 10.1111/j.1540-8191.2011.01215.x. Epub 2011 Feb 23.
Departamento de Cirurgia Cardiovascular e Torácica, Allegheny General Hospital, Pittsburgh, Pennsylvania 15212, EUA.