1. Centre of Molecular Medicine Institute of Virology, Slovak Academy of Sciences Dubravska cesta 9 842 45 Bratislava Slovak Republic
2. Institute of Medical Technology University of Tampere and Tampere University Hospital Biokatu 6 33520 Tampere Finland
3. Università degli Studi di Firenze Dipartimento di Chimica, Laboratorio di Chimica Bioinorganica Via della Lastruccia, 3, Rm. 188 I-50019 Sesto Fiorentino (Florence) Italy