1. Department of Preventive and Community Dentistry; Faculty of Dentistry; Universitas Gadjah Mada; Yogyakarta Indonesia
2. Dental Hygiene Program; Faculty of Dentistry; Universitas Gadjah Mada; Yogyakarta Indonesia
3. Department of Dentomaxillofacial Radiology; Faculty of Dentistry; Universitas Gadjah Mada; Yogyakarta Indonesia
4. Department of Oral Medicine; Faculty of Dentistry; Universitas GadjahMada; Yogyakarta Indonesia