1. Department of Education and Social Policy, University of Macedonia, Thessaloniki, Greece
2. Department of Psychiatry, PUK University Hospital Zurich, Zurich, Switzerland
3. Rehabilitation Center Valens, Valens, Switzerland
4. Department of Mechanical Engineering, Aristotle University of Thessaloniki, Thessaloniki, Greece
5. Department of Supply Chain Management, International Hellenic University, Thessaloniki, Greece
6. Department of Nutrition and Dietetics, Harokopio University, Athens, Greece