1. Department of Oral Microbiology and Immunology, Institute of Odontology; Sahlgrenska Academy, University of Gothenburg; Gothenburg Sweden
2. Department of Periodontology, Institute of Odontology; Sahlgrenska Academy, University of Gothenburg; Gothenburg Sweden
3. Department of Oral Prosthetics, Institute of Odontology; Sahlgrenska Academy, University of Gothenburg; Gothenburg Sweden
4. Department of Oral and Maxillofacial Surgery, Institute of Odontology; Sahlgrenska Academy, University of Gothenburg; Gothenburg Sweden
5. Department of Otolaryngology, Head and Neck Surgery; Sahlgrenska Academy, University of Gothenburg, Sahlgrenska University Hospital; Gothenburg Sweden