1. Department of Veterinary Biosciences, University of Helsinki, Finland
2. Laboratory of Microbiology, Wageningen University, Wageningen, Netherlands
3. Department of Bacteriology and Immunology, Haartman Institute, University of Helsinki, Finland
4. Valio R&D, Helsinki, Finland
5. Quantitative Biology and Bioinformatics, VTT Technical Research Centre of Finland, Espoo, Finland