1. Section for Periodontology, Microbiology, and Community Dentistry, Department of Odontology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
2. Department of Immunology and Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
3. Department of Medical Microbiology, Copenhagen University Hospital, Copenhagen, Denmark
4. Department of Microbiology, The Forsyth Institute, Cambridge, MA, USA
5. Department of Oral Medicine, Infection and Immunity, Harvard School of Dental Medicine, Boston, MA, USA
6. Section for Oral Medicine, Department of Odontology, Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark