1. Department of Radiology and Nuclear Medicine; Radboud University Medical Center; Nijmegen The Netherlands
2. Center for Magnetic Resonance Research; University of Minnesota; Minneapolis MN USA
3. FMRIB Centre, Nuffield Department of Clinical Neurosciences; University of Oxford; UK
4. Department of Radiology; University Medical Center Utrecht; Utrecht The Netherlands
5. C. J. Gorter Center for High Field MRI, Department of Radiology; Leiden University Medical Center; Leiden the Netherlands
6. Erwin L. Hahn Institute; University Hospital Duisburg-Essen; Essen Germany