1. Institute of RadioisotopesRadiodiagnostic Products, National Center for Scientific Research “Demokritos”, 15310 Athens, Greece; Biomedica Life Sciences, S. A., 15451 Athens, Greece; Department of Pharmacy, University of Patras, 26500 Patras, Greece; and Institute of Pathology, University of Bern, CH-3010 Bern, Switzerland