1. Istituto di Chimica Inorganica e delle Superfici − C.N.R., Area della Ricerca, Corso Stati Uniti, 4, 35127 Padua, Italy, Fax: (internat.) +39‐049‐8702911
2. Laboratory of Nuclear Medicine, Department of Clinical & Experimental Medicine, University of Ferrara, Via L. Borsari, 46, 44100 Ferrara, Italy
3. Department of Pharmaceutical Sciences, University of Padua, Via Marzolo, 5, 35131 Padua, Italy
4. ISTM − C.N.R., Area della Ricerca, Corso Stati Uniti, 4, 35127 Padua, Italy