1. Organ Transplant Unit, Hippokration General Hospital Aristotle University of Thessaloniki Thessaloniki Greece
2. Surgical Oncology Department Theageneio Anticancer Hospital of Thessaloniki Thessaloniki Greece
3. First General Surgery Department Papageorgiou General Hospital Aristotle University of Thessaloniki Thessaloniki Greece
4. Second Department of Ophthalmology Papageorgiou General Hospital Aristotle University of Thessaloniki Thessaloniki Greece