1. Università Degli Studi di Bergamo,Department of Engineering and Applied Sciences,Bergamo,Italy
2. Università di Pavia,Department of Electrical, Computer and Biomedical Engineering,Pavia,Italy
3. Oak Ridge National Laboratory,Oak Ridge,Tennessee,United States of America
4. Istituto Nazionale Fisica Nucleare,Trieste Section,Trieste,Italy
5. Massachussetts Institute of Technology,Cambridge,Massachusetts,United States of America
6. Agenzia Spaziale Italiana,Roma,Italy