1. Department of Occupational Medicine First Faculty of Medicine Charles University and General University Hospital in Prague Prague Czech Republic
2. National Institute of Public Health Prague Czech Republic
3. Institute of Nuclear Medicine First Faculty of Medicine Charles University and General University Hospital in Prague Prague Czech Republic
4. Department of Neurology First Faculty of Medicine Charles University and General University Hospital in Prague Prague Czech Republic
5. J. Heyrovsky Institute of Physical Chemistry of the CAS, v.v.i. Prague Czech Republic
6. Institute of Biochemistry and Laboratory Diagnostics First Faculty of Medicine Charles University and General University Hospital in Prague Prague Czech Republic
7. State Veterinary Institute Prague Chemistry Czech Republic