Off-Pump Coronary Artery Bypass Surgery May Reduce the Incidence of Stroke in Patients with Significant Left Main Stem Disease - Panesar, S. S.; Chikwe, J.; Mirza, S. B.; Rahman, M. S.; Warren, O.; Rao, C.; Negus, J.; Zacharakis, E.; Darzi, A.; Athanasiou, T. (The Thoracic and Cardiovascular Surgeon, 2008)