1. Periodontology Specialist Program, Department of Periodontology, Faculty of Dentistry, Universitas Indonesia, Jakarta 10430, Indonesia
2. Undergraduate Program, Faculty of Dentistry, Universitas Indonesia, Jakarta 10430, Indonesia
3. Department of Periodontology, Faculty of Dentistry, Universitas Indonesia, Jakarta 10430, Indonesia
4. College of Dentistry, University of the Philippines Manila, Manila 1000, Philippines