Left internal thoracic artery composite grafts as the technique of choice for myocardial revascularization in elderly patients: a prospective randomized evaluation. - Muneretto,C.; Bisleri,G.; Negri,A.; Jacopo,M.; Carone,E.; Morgan,J.; Metra,M.; Dei Cas,L. (J Thorac Cardiovasc Surg, 2004)