1. Department of Pediatrics and Adolescent Medicine; First Faculty of Medicine; Charles University in Prague; Kateřinská 32 121 08 Prague 2 Czech Republic
2. Institute of Molecular Genetics; The Academy of Science of the Czech Republic; Vídeňská 1083 142 20 Prague 4 Czech Republic
3. Department of Biochemistry and Microbiology; University of Chemistry and Technology in Prague; Technická 5 166 28 Prague 6 Czech Republic
4. Department of Analytical Chemistry; University of Chemistry and Technology in Prague; Technická 3 166 28 Prague 6 Czech Republic