1. Department of Speech & Language Therapy, University of Ioannina , Ioannina , 45110 , Greece
2. Department of Speech & Language Therapy, Faculty of Health Sciences, European University , Engomi Nicosia , 2404 , Cyprus
3. Medical School of Athens, National and Kapodistrian University of Athens , Goudi Athens , 11527 , Greece
4. Department of Linguistics, School of Philology, Faculty of Philosophy, University of Ioannina , Ioannina , 45110 , Greece