1. Laboratory of Cellular and Molecular Engineering, University of Bologna, I-47521 Cesena, Italy
2. Department of Medical Surgery and Bioengineering, University of Siena, I-53100 Siena, Italy
3. Department of Industrial Chemistry, University of Bologna, Viale Risorgimento 4, I-40136
Bologna, Italy
4. CSGI, University of Firenze, Via della Lastruccia 3, I-50019
Sesto Fiorentino, Italy
5. Department of Biochemistry “G. Moruzzi”, University of Bologna, I-40126 Bologna, Italy