1. Theagenio Oncology Hospital, Thessaloniki, Greece
2. Department of Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece
3. Alexander Technological Institute of Thessaloniki, Thessaloniki, Greece
4. General Hospital “Asklepeion” Voulas, Athens, Greece
5. School of Dentistry, Aristotle University of Thessaloniki, Thessaloniki, Greece
6. Technological Educational Institute of Thessaly, Larisa, Greece