1. J.
Heyrovský Institute of Physical Chemistry, v.v.i., Czech Academy of Sciences, Dolejškova 3, 18223 Prague, Czech Republic
2. Institute
of Microbiology, Czech Academy of Sciences, Vídeňská 1083, 142 20 Prague 4, Czech Republic
3. Faculty
of Medicine and Dentistry, Palacký University, Hněvotínská
3, 77515 Olomouc, Czech Republic