1. Department of Periodontology, Faculty of Dental Medicine Universitas Airlangga, Jl. Prof. Dr. Moestopo No. 47 Surabaya – Indonesia.
2. Periodontology Specialist Program Student, Faculty of Dental Medicine Universitas Airlangga, Jl. Prof. Dr. Moestopo No. 47 Surabaya – Indonesia.
3. Professor of Department of Periodontology, Faculty of Dental Medicine Universitas Airlangga, Jl. Prof. Dr. Moestopo No. 47 Surabaya – Indonesia.