1. Department of Periodontology; Faculty of Dentistry; Yeditepe Univesity; Istanbul Turkey
2. Department of Periodontology; Faculty of Dentistry; Istanbul Aydin University; Istanbul Turkey
3. Department of Periodontology; Faculty of Dentistry; Ondokuzmayis University; Samsun Turkey
4. Department of Periodontology; Faculty of Dentistry; Istanbul Research and Application Center; Baskent University; Istanbul Turkey
5. Department of Periodontology; Faculty of Dentistry; Istanbul University; Istanbul Turkey
6. Division of Virology and Immunology; Department of Microbiology; Faculty of Medicine; Istanbul University; Istanbul Turkey