1. Department of Rheumatology and Inflammation Research, University of Gothenburg, Gothenburg, Sweden;
2. Department of Oral Microbiology and Immunology, Institute of Odontology, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden; and
3. Molecular, Cellular and Pharmacobiology Section, Institute of Pharmaceutical Biology, University of Bonn, Bonn, Germany