Centre for Experimental Medicine, Institute for Clinical and Experimental Medicine, Prague, Czech Republic. Department of Medical Biochemistry and Laboratory Diagnostics, First Faculty of Medicine and General University Hospital, Charles University in Prague, Prague, Czech Republic. Diabetes Centre, Institute for Clinical and Experimental Medicine, Prague, Czech Republic. Third Department of Medicine-Department of Endocrinology and Metabolism, First Faculty of Medicine and General University Hospital, Charles University in Prague, Prague, Czech Republic. Department of Sports Medicine, First Faculty of Medicine and General University Hospital, Charles University in Prague, Prague, Czech Republic. Department of Psychiatry, First Faculty of Medicine and General University Hospital, Charles University in Prague, Prague, Czech Republic. Centre for Experimental Medicine, Institute for Clinical and Experimental Medicine, Prague, Czech Republic. halm@ikem.cz. Department of Medical Biochemistry and Laboratory Diagnostics, First Faculty of Medicine and General University Hospital, Charles University in Prague, Prague, Czech Republic. halm@ikem.cz. Diabetes Centre, Institute for Clinical and Experimental Medicine, Prague, Czech Republic. halm@ikem.cz.