1. Chair of Microbial Ecology, TUM School of Life Sciences, Technical University of Munich , Freising, Germany
2. Department of Veterinary Sciences, Faculty of Veterinary Medicine, Ludwig-Maximilians University of Munich , Oberschleiβheim, Germany
3. Department of Microbiology, School of Genetics and Microbiology, Moyne Institute of Preventive Medicine, Trinity College Dublin , Dublin, Ireland