Navigation system for minimally invasive esophagectomy: experimental study in a porcine model. - Nickel F; Kenngott HG; Neuhaus J; Sommer CM; Gehrig T; Kolb A; Gondan M; Radeleff BA; Schaible A; Meinzer HP; Gutt CN; Müller-Stich BP (Surgical endoscopy, 2013)