1. Mucosal Biology Group, Department of Cell and Molecular Biology, Section for Molecular Pathogenesis, Lund University, Lund, Sweden
2. Faculty of Odontology, Lund University, Malmö, Sweden
3. Department of Obstetrics and Gynecology, Faculty of Health Sciences, Aarhus University Hospital, Skejby Hospital, DK-8200, Aarhus N, Denmark
4. Department of Oral Biochemistry, ACTA, Vrije Universiteit, 1081, BT Amsterdam, The Netherlands