Excision of the Coronary Orifices in Arterial Switch Operation: “O” Like Obstructive and “U” Like Unobstructive? - Beierlein, W; Freitag, H -P; Salehi-Gilani, S; Kaulitz, R; Pietsch, B; Luhmer, I; Hofbeck, M; Ziemer, G (The Thoracic and Cardiovascular Surgeon, 2004)