1. Center for Radiopharmaceutical Sciences ETH-PSI-USZ; Institute of Pharmaceutical Sciences ETH; Vladimir-Prelog Weg 4 CH-8093 Zurich Switzerland
2. Center for Radiopharmaceutical Sciences ETH-PSI-USZ; Paul Scherrer Institute; CH-5232 Villigen Switzerland
3. Department of Nuclear Medicine; Medical University of Innsbruck; A-6020 Innsbruck Austria
4. Ludwig Boltzmann Institute Applied Diagnostics; General Hospital of Vienna; Währinger Gürtel 18-20 A-1090 Vienna Austria