1. Department of Information Engineering, Computer Science and Mathematics, University of L’Aquila, L’Aquila, Italy
2. Center of Excellence DEWS, University of L’Aquila, L’Aquila, Italy
3. Department of Computer Science, University of Bari Aldo Moro, Bari, Italy
4. Department of Biotechnological and Applied Clinical Sciences, University of L’Aquila, L’Aquila, Italy