1. Department of Periodontology, Faculty of Dentistry, Atatürk University, Erzurum, Turkey.
2. Department of Periodontology, Faculty of Dentistry, Recep Tayyip Erdogan University, Rize, Turkey.
3. Medical Laboratory Department, Health Services Vocational Training School, Atatürk University.
4. Department of Periodontology, Faculty of Dentistry, Adıyaman University, Adıyaman, Turkey.
5. Department of Periodontology, Faculty of Dentistry, Pamukkale University, Denizli, Turkey.