1. Division
of Radiological Chemistry, University Hospital Basel, Petersgraben 4, CH-4031 Basel, Switzerland
2. Department
of Nuclear Medicine, University Hospital Freiburg, Hugstetter
Strasse 55, 79106 Freiburg, Germany
3. Division
of Cell Biology and Experimental Cancer Research, Institute of Pathology, University of Berne, Murtenstrasse 31, CH-3010 Berne, Switzerland
4. Global
Drug Discovery, Bayer Healthcare, Berlin, Muellerstrasse 178, 13342 Berlin, Germany