1. Department of Periodontology, Operative and Preventive Dentistry; University Hospital Bonn; Bonn Germany
2. Periodontal Research Group; Birmingham Dental School and Hospital; Birmingham UK
3. Faculty of Dentistry; Department of Endodontics; King AbdulAziz University; Jeddah Saudi Arabia
4. Department of Immunology and Infectious Diseases; The Forsyth Institute; Cambridge MA USA
5. Harvard University School of Dental Medicine; Boston MA USA
6. Academy of Sciences of Moldova; Institute of Zoology; Chisinau Moldova
7. Institute of Medical Microbiology, Immunology and Parasitology; University Hospital Bonn; Bonn Germany
8. Division of Microbiology; Paul-Ehrlich-Institut; Langen Germany
9. Section Experimental Dento-Maxillo-Facial Medicine; University Hospital Bonn; Bonn Germany
10. College of Dental Medicine; Nova Southeastern University; Fort Lauderdale FL USA