1. Laboratory of Sports Medicine, Sports Medicine Division, Aristotle University of Thessaloniki, Thessaloniki, Greece
2. Department of Endocrinology, Medical School, University of Ioannina, Ioannina, Greece
3. Faculty of Medicine, Institute of Pharmacology and Experimental Toxicology, University of Ljubljana, Ljubljana, Slovenia
4. Slovenian Anti-Doping Organization (SLOADO), Ljubljana, Slovenia