1. Department of Public Health and Preventive Medicine, Faculty of Medicine in Pilsen, Charles University, Prague, Czech Republic
2. Faculty Hospital in Pilsen, Pilsen, Czech Republic
3. Third Internal Clinic, 1st Medical Faculty in Prague, Charles University, Prague, Czech Republic
4. The National Institute of Public Health, Prague, Czech Republic
5. NTIS, European Center of Excellence New Technologies for the Information Society, University of West Bohemia, Pilsen, Czech Republic