1. Division of Primary Care Hellenic Army Medical Corps Kastoria Greece
2. Section of Cardiovascular Medicine, Yale New Haven Hospital Yale University School of Medicine New Haven Connecticut USA
3. 3rd Department of Pediatrics, Ippokrateio General Hospital Of Thessaloniki Aristotle University of Thessaloniki Thessaloniki Greece
4. Department of Dermatology and Venereology 401 General Military Hospital of Athens Athens Greece
5. 1st Department of Surgery, Laikon General Hospital National and Kapodistrian University of Athens Athens Greece