End of the Millenium - End of the Single Thoracic Artery Graft? Two Thoracic Arteries - Standard for the Next Millenium? - Gansera, B; Günzinger, R; Angelis, I; Eichinger, W; Neumaier, P; Breuer, M; Kemkes, B M (The Thoracic and Cardiovascular Surgeon, 2001)