Increased FiO[sub 2] Improves Intrathecal Oxygenation During Thoracic Aortic Cross-clamping in Pigs. - Christiansson, Lennart; Ulus, A. Tulga; Hellberg, Anders; Bergqvist, David; Wiklund, Lars; Karacagil, Sadettin (Scandinavian Cardiovascular Journal, 2001)