1. Institute of Molecular Genetics, Academy of Sciences of the Czech Republic, Videňská 1083, 142 20 Prague 4, Czech Republic
2. Institute of Chemical Technology, Prague, Technická 5, 166 28, Prague 6, Czech Republic
3. First Faculty of Medicine, Charles University in Prague, Kateřinská 32, 121 08 Prague 2, Czech Republic
4. Zentiva Development (Part of the sanofi-aventis Group), U Kabelovny 130, 10237 Prague 10, Czech Republic