1. Department of Life Sciences, University of Modena and Reggio Emilia, Via G. Campi 287, Modena, Italy
2. Institute of Animal Physiology, Slovak Academy of Sciences, Soltesovej 4-6, 040 01 Kosice, Slovakia
3. Microbiology Department, Faculty of Medicine, School of Health Sciences, University of Ioannina, Ioannina, Greece