Non-assisted versus neuro-navigated and XperCT-guided external ventricular catheter placement: a comparative cadaver study. - Gautschi, Oliver; Smoll, N.; Kotowski, M.; Schatlo, B.; Tosic, M.; Stimec, B.; Fasel, J.; Schaller, K.; Bijlenga, P. (Acta Neurochirurgica, 2014)