1. Department of Clinical Microbiology, Clinical Bacteriology, Umeå University, SE-901 85 Umeå, Sweden
2. Proteome Center for the Study of Intracellular Parasitism of Bacteria, Faculty of Military Health Science, University of Defence, Trebesská 1575, 500 01 Hradec Králové, Czech Republic
3. National Research Council Canada, Institute for Biological Sciences, Ottawa, Ontario, K1A 0R6, Canada