Interview with Mario Gaudino, MD, author of Comparison of Long-term Clinical Outcomes of Skeletonized vs Pedicled Internal Thoracic Artery Harvesting Techniques in the Arterial Revascularization Trial, and Frank W. Sellke, MD, author of Coronary Artery Bypass Grafting With the Internal Thoracic Artery: A Great Operation With Some Unanswered Questions