1. University of Peloponnese,Department of Informatics and Telecommunications,Tripolis,Greece
2. University of Ioannina,Department of Physics, Electronics-Telecoms and Appl. Lab (ETA-Lab),Ioannina,Greece
3. University of Ioannina,Department of Speech Language Therapy,Ioannina,Greece
4. University of Patras,Department of Electrical and Computer Engineering,Patras,Greece