1. Departments of Neurosurgery, Hôpital Erasme-Ulb, Brussels, Belgium
2. Departments of Neuro-Pathology, Hôpital Erasme-Ulb, Brussels, Belgium
3. Department of Oncology, Hôpital de la Ville, Esch-sur-Alzette
4. Department of Radiology, Centre Hospitalier de Luxembourg, Grand Duché de Luxembourg