1. High‐field Magnetic Resonance Center Max Planck Institute for Biological Cybernetics Tuebingen Germany
2. German Center for Neurodegenerative Diseases (DZNE) Bonn Germany
3. Department of Biomedical Magnetic Resonance Eberhard Karls University Tuebingen Tuebingen Germany
4. Department of Physics and Astronomy University of Bonn Bonn Germany
5. Department of Neuroradiology University Hospital Erlangen Erlangen Germany