Spinal navigation: The technical error in navigated minimal invasive pedicle screw placement
Ulrich Hubbe (Freiburg i. Br.), Ioannis Vasilikos (Freiburg i. Br.), Angeliki Stathi (Freiburg i. Br.), Amir El-Rahal (Freiburg i. Br.), Roland Rölz (Freiburg i. Br.), Jürgen Beck (Freiburg i. Br.), Roberto Doria-Medina (Freiburg i. Br.)