1. Faculty of Medicine, University of Thessaly, Larisa, Greece
2. Laboratory of Hygiene and Epidemiology, Faculty of Medicine, University of Thessaly, Larisa, Greece
3. Department of Medical Oncology, University Hospital of Ioannina, Ioannina, Greece
4. Department of Diagnostic Radiology, Faculty of Medicine, University of Thessaly, Larisa, Greece
5. Respiratory Medicine Department, Faculty of Medicine, University of Thessaly, Larisa, Greece
6. Department of Neurology, University Hospital of Larisa, Larisa, Greece
7. Faculty of Medicine, School of Health Sciences, University of Thessaly, Volos, Greece