Virtual Endoscopy is a Useful Device for Training and Preoperative Planning of Transsphenoidal Endoscopic Pituitary Surgery - Wolfsberger, S; Forster, M -T; Donat, M; Neubauer, A; Bühler, K; Wegenkittl, R; Czech, T; Hainfellner, J A; Knosp, E (min - Minimally Invasive Neurosurgery, 2004)