Approach to intraoperative electromagnetic navigation in orthognathic surgery: a phantom skull based trial - Berger, Moritz; Kallus, Sebastian; Nova, Igor; Ristow, Oliver; Eisenmann, Urs; Dickhaus, Hartmut; Kühle, Reinald; Hoffmann, Jürgen; Seeberger, Robin (Journal of cranio-maxillofacial surgery, 2015)