1. Department of Nephrology Hippokration Hospital, Aristotle University of Thessaloniki Thessaloniki Greece
2. Department of Respiratory Medicine G. Papanikolaou Hospital Thessaloniki Greece
3. Third Department of Cardiology Hippokration Hospital, Aristotle University of Thessaloniki Thessaloniki Greece
4. Exercise Physiology and Biochemistry Laboratory, Department of Sports Science Aristotle University Serres Greece