1. Department of Nephrology Hippokration Hospital, Aristotle University of Thessaloniki Thessaloniki Greece
2. Department of Nephrology Papageorgiou Hospital Thessaloniki Greece
3. Department of Cardiology Papageorgiou Hospital Thessaloniki Greece
4. 3rd Department of Cardiology Hippokration Hospital, Aristotle University of Thessaloniki Thessaloniki Greece
5. 1st Department of Cardiology AHEPA Hospital, Aristotle University of Thessaloniki Thessaloniki Greece