1. Group of NMR Signal Enhancement Max Planck Institute for Multidisciplinary Sciences, Am Fassberg 11, 37077 Göttingen, Germany
2. Center for Biostructural Imaging of Neurodegeneration University Medical Center Göttingen, Von-Siebold-Str. 3A, 37075 Göttingen, Germany
3. Clinic for Hematology and Medical Oncology University Medical Center Göttingen, Robert-Koch-Str. 40, 37075 Göttingen, Germany