1. Department of Occupational Medicine, First Faculty of Medicine, Charles University in Prague and General University Hospital in Prague, Prague, Czech Republic;
2. Institute of Chemical Process Fundamentals of the CAS, Prague, Czech Republic;
3. Institute of Chemical Technology Prague, Prague, Czech Republic;
4. Department of Methodology, Faculty of Physical Education and Sport, Charles University in Prague, Prague, Czech Republic;
5. First Faculty of Medicine, Institute of Informatics, Charles University in Prague and General University Hospital in Prague, Prague, Czech Republic;
6. J. Heyrovský Institute of Physical Chemistry of the CAS, Prague, Czech Republic;
7. Department of Chemistry, “G. Scansetti” Interdepartmental Centre, and NIS Interdepartmental Centre, University of Torino, Torino, Italy;
8. UMass Lowell, Department of Public Health, College of Health Sciences, Lowell, MA, USA