The role of a computed tomography-based image registered navigation system for natural orifice transluminal endoscopic surgery: a comparative study in a porcine model - Fernández-Esparrach, G.; San José Estépar, R.; Guarner-Argente, C.; Martínez-Pallí, G.; Navarro, R.; Rodríguez de Miguel, C.; Córdova, H.; Thompson, C. C.; Lacy, A. M.; Donoso, L.; Ayuso-Colella, J. R.; Ginès, A.; Pellisé, M.; Llach, J.; Vosburgh, K. G. (Endoscopy, 2010)