Internal-Mammary Coronary Artery Grafts: Is their Superiority also Due to a Basically Intact Endothelium? - Lehmann, K H; Segesser, L von; Müller-Glauser, W; Siebenmann, R; Schneider, K; Lüscher, T F; Turina, M (The Thoracic and Cardiovascular Surgeon, 1989)