1. Biomedical Engineering Laboratory, National Technical University of Athens, 9, Herοon Polytechniou Str., Zografou, 15773 Athens, Greece
2. Biomechanics Laboratory, Physiotherapy Department, University of the Peloponnese, 23100 Sparta, Greece
3. Physioloft, Physiotherapy Center, 14562 Kifisia, Greece
4. CNA Lab, Department of Informatics, Telecommunications University of Peloponnese, 22100 Tripoli, Greece
5. Unit of Medical Technology and Intelligent Information Systems, University of Ioannina, 45110 Ioannina, Greece
6. Biomedical Research Institute, Foundation for Research and Technology-Hellas (FORTH), 70013 Heraklion, Greece