1. Department of Periodontology Cyprus International University Faculty of Dentistry Nicosia Cyprus
2. Department of Periodontology Gazi University Faculty of Dentistry Ankara Turkey
3. Department of Medical Biochemistry Ankara University Faculty of Medicine Ankara Turkey
4. İstanbul Okmeydanı Dental Health Hospital İstanbul Turkey
5. Sincan Dental Health Hospital Ankara Turkey
6. Department of Biostatistics Ankara University Faculty of Medicine Ankara Turkey