1. School of Biomolecular and Biomedical Science and Conway Institute, University College Dublin, Belfield, Dublin, Ireland
2. Microbiology, School of Natural Sciences, National University of Ireland, Galway, Ireland
3. Department of Microbiology, Trinity College, Dublin, Ireland
4. Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha, Nebraska, USA
5. Department of Oral Biology, Faculty of Odontology, Malmö University, Malmö, Sweden