Thoracic and thoracoabdominal aortic aneurysm repair: use of evoked potential monitoring in 118 patients. - van Dongen,E.P.; Schepens,M.A.; Morshuis,W.J.; ter Beek,H.T.; Aarts,L.P.; de Boer,A.; Boezeman,E.H. (J Vasc Surg, 2001)