1. UCL Institute of Child Health and Great Ormond Street Hospital, London, UK; UCL Queen Square Institute of Neurology, Clinical and Movement Neurosciences, London, UK
2. Department of Neurology, University Medical Center Goettingen, Germany
3. Paracelsus-Elena-Klinik, Kassel, Germany
4. Department of Experimental, Diagnostic, and Specialty Medicine (DIMES), University of Bologna, Bologna, Italy
5. IRCCS Istituto delle Scienze Neurologiche di Bologna, Bologna, Italy
6. UCL Queen Square Institute of Neurology, Clinical and Movement Neurosciences, London, UK; National Hospital for Neurology & Neurosurgery, Queen Square, London, WC1N3BG
7. UCL Queen Square Institute of Neurology, Clinical and Movement Neurosciences, London, UK; National Hospital for Neurology & Neurosurgery, Queen Square, London, WC1N3BG; Department of Neurology, University Hospital Wuerzburg, Josef-Schneiderstr. 11, 97080 Wuerzburg, Germany
8. Institute of Diagnostic and Interventional Neuroradiology, University Medical Center Goettingen, Germany
9. Paracelsus-Elena-Klinik, Kassel, Germany; Department of Neurology, Philipps-University, Marburg, Germany
10. UCL Institute of Child Health and Great Ormond Street Hospital, London, UK
11. Paracelsus-Elena-Klinik, Kassel, Germany; Department of Neurosurgery, University Medical Center Goettingen, Robert-Koch Str. 40, 37075 Goettingen, Germany
12. UCL Queen Square Institute of Neurology, Clinical and Movement Neurosciences, London, UK
13. Department of Neurology, University Medical Center Goettingen, Germany; Paracelsus-Elena-Klinik, Kassel, Germany