1. Department of Nephrology; General Hospital of Pella; Edessa Greece
2. Department of General Practice and Family Medicine; General Hospital of Pella; Edessa Greece
3. Medical School, Aristotle University of Thessaloniki; Thessaloniki Greece
4. Department of General Surgery; General Hospital of Pella; Edessa Greece
5. Department of Pathology; General Hospital Hippokrateion; Thessaloniki Greece