1. Institute of Nuclear Chemistry Johannes Gutenberg-University Mainz Fritz-Strassmann-Weg 2 55128 Mainz Germany
2. Institute of Pharmacology (Center for Physiology and Pharmacology) Medical University of Vienna Währinger Straße 13a 1090 Wien Austria
3. Department of Nuclear Medicine Rostock University Medical Center Gertrudenplatz 1 18057 Rostock Germany
4. Institute of Anatomy Rostock University Medical Center Gertrudenstraße 9 18057 Rostock Germany