1. Department of ENT, Head and Neck Surgery, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland;
2. Image-Guided Therapy and Artificial Hearing Research, ARTORG Center for Biomedical Engineering Research, University of Bern, Bern, Switzerland;
3. Musculoskeletal Biomechanics, Institute for Surgical Technologies and Biomechanics, University of Bern, Bern, Switzerland;
4. University Department of Diagnostic and Interventional Neuroradiology, Inselspital, Bern University Hospital, Bern, Switzerland;
5. Department of Neurology, Inselspital, University of Bern, Bern, Switzerland;
6. MED-EL Medical Electronics, Innsbruck, Austria