1. Department of Nuclear Medicine, University Medical Centre Ljubljana, Zaloška Cesta 7, SI-1000 Ljubljana, Slovenia
2. Division of Radiological Chemistry, University Hospital Basel, Petersgraben 4, CH-4031 Basel, Switzerland
3. Department of Nuclear Medicine, University of Freiburg, Hugstetterstrasse 55, 79106 Freiburg, Germany
4. Faculty of Pharmacy, University of Ljubljana, Aškerčeva Cesta 7, SI-1000 Ljubljana, Slovenia
5. Division of Cell Biology and Experimental Cancer Research, Institute of Pathology, University of Berne, Murtenstrasse 31, CH-3010 Berne, Switzerland
6. Department of Nuclear Medicine/PET Center, Zentralklinik Bad Berka, Bad Berka, Germany