Shoaib, A., Johnson, T. W., Banning, A., Ludman, P., Rashid, M., Potts, J., Shing Kwok, C., Kontopantelis, E., Azam, Z. A., Kinnaird, T., & Mamas, M. A. Clinical Outcomes of Percutaneous Coronary Intervention for Chronic Total Occlusion in Native Coronary Arteries vs Saphenous Vein Grafts