1. Department of Interventional Neuroradiology, The Royal London Hospital, London, UK
2. Department of Neurosurgery, Semmes Murphy Clinic and University of Tennessee Health Sciences Center, Memphis, TN, USA
3. Department of Diagnostic and Therapeutic Neuroradiology, Centre Hospitalier Universitaire de Toulouse, Toulouse, France
4. Clinic for Neuroradiology, Klinikum Stuttgart, Stuttgart, Germany
5. Department of Neurosurgery, Stony Brook University Hospital, Stony Brook, NY, USA
6. Department of diagnostic and therapeutic neuroradiology, Centre Hospitalier Universitaire de Reims, Reims, France