1. Center for Magnetic Resonance Research University of Minnesota Minneapolis Minnesota USA
2. Department of Chemistry, In vivo‐MR Group University Bremen Bremen Germany
3. Department of Radiology Magnetic Resonance Research Center University of Pittsburgh Pittsburgh Pennsylvania USA
4. Departments of Radiology and Biomedical Research University Bern Bern Switzerland
5. Department of Radiology and Biomedical Imaging, Magnetic Resonance Research Center Yale University School of Medicine New Haven Connecticut USA
6. Russell H. Morgan Department of Radiology and Radiological Science Johns Hopkins University School of Medicine Baltimore Maryland USA
7. Department of Radiology Stanford University, Stanford California USA
8. Department of Radiology Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital Boston Massachusetts USA