1. Department of Nuclear Medicine, University Hospital of the Westfälische Wilhelms-Universität Münster, Germany, Institute of Organic Chemistry, University of Münster, Münster, Germany, Institute of Pathophysiology, Center of Internal Medicine, University Hospital, Essen, Germany, Interdisciplinary Center of Clinical Research (IZKF), Münster, Germany, and European Institute of Molecular Imaging (EIMI), Münster, Germany