1. Werner Siemens Imaging Center, Department of Preclinical Imaging and RadiopharmacyEberhard Karls University Tübingen Röntgenweg 15 72076 Tübingen Germany
2. Department of NMR-based Structural BiologyMax Planck Institute for Biophysical Chemistry Am Fassberg 11 37077 Göttingen Germany
3. MODAG GmbH Mikro-Forum-Ring 3 55234 Wendelsheim Germany
4. Center for Neuropathology and Prion ResearchLudwig Maximilians University Feodor-Lynen-Str. 23 81377 Munich Germany
5. Department for Nuclear Medicine and PET CenterAarhus University Hospital Palle Juul-Jensens Boulevard 165 8200 Aarhus Denmark