1. Department of Sports Medicine, First Faculty of Medicine and General University Hospital, 128 08 Prague, Czech Republic
2. Centre for Experimental Medicine, Institute for Clinical and Experimental Medicine, 140 21 Prague, Czech Republic
3. Diabetes Centre, Institute for Clinical and Experimental Medicine, 140 21 Prague, Czech Republic
4. Institute of Medical Biochemistry and Laboratory Diagnostics, First Faculty of Medicine, Charles University and General University Hospital, 121 11 Prague, Czech Republic
5. Department of Biochemistry and Microbiology, University of Chemistry and Technology Prague, Technicka 5, 166 28 Prague, Czech Republic