1. Department of Neurology; Medical University of Graz; Graz Austria
2. Division of Neuroradiology, Department of Radiology; Medical University of Graz; Graz Austria
3. Sobell Department; UCL Institute of Neurology; London United Kingdom
4. Institute for Medical Informatics, Statistics and Documentation; Medical University of Graz; Graz Austria
5. Department of Neurology; University of Groningen, University Medical Center Groningen; Groningen The Netherlands
6. Department for Cardiovascular and Cell Sciences; St. George's University of London; London United Kingdom