1. Department of Neurosurgery, AZ Delta, Roeselare, Belgium
2. Department of Neurosurgery, Jan Yperman Hospital, Ypres, Belgium
3. Department of Neurology, Jan Yperman Hospital, Ypres, Belgium
4. Department of Ear, Nose and Throat Surgery, Jan Yperman Hospital, Ypres, Belgium
5. Department of Radiology, Jan Yperman Hospital, Ypres, Belgium