1. Danish Research Centre for Magnetic Resonance, Centre for Functional and Diagnostic Imaging and Research Copenhagen University Hospital Hvidovre Denmark
2. Department of Physical Therapy and Human Movement Sciences Northwestern University Chicago Illinois
3. Department of Neurology Northwestern University Chicago Illinois
4. Department of Applied Mathematics and Computer Science Technical University of Denmark Kongens Lyngby Denmark
5. C. J. Gorter Center for High Field MRI, Department of Radiology Leiden University Medical Center Leiden The Netherlands