1. Institute of Inorganic and Analytical Chemistry, University of Münster, Corrensstrasse 30, 48149 Münster, Germany
2. European Institute for Molecular Imaging, University of Münster, Mendelstrasse 11, 48149 Münster, Germany
3. Department of Nuclear Medicine, University Hospital of Münster, Albert-Schweitzer-Strasse 33, 48149 Münster, Germany