1. Division of Endodontics; Department of Dental Medicine; Karolinska Institutet; Huddinge Sweden
2. Division of Clinical Microbiology; Department of Laboratory Medicine; Karolinska Institutet; Huddinge Sweden
3. Department of Clinical Microbiology; Karolinska University Hospital; Huddinge Sweden
4. Division of Oral and Maxillofacial Surgery; Department of Dental Medicine; Karolinska Institutet; Huddinge Sweden
5. Department of Oral and Maxillofacial Surgery; Karolinska University Hospital; Huddinge Sweden