1. Department of Nephrology Hippokration Hospital Aristotle University of Thessaloniki Thessaloniki Greece
2. Department of Respiratory Medicine G. Papanikolaou Hospital Thessaloniki Greece
3. Second Propedeutic Department of Internal Medicine Hippokration Hospital Aristotle University of Thessaloniki Thessaloniki Greece
4. Laboratory of Exercise Physiology and Biochemistry Department of Physical Education and Sports Science at Serres Aristotle University of Thessaloniki Serres Greece