1. Department of Dental Public Health, Faculty of Dental Medicine, Universitas Airlangga, Surabaya, Indonesia
2. Department of Public Administration, Faculty of Social and Political Sciences, Universitas Airlangga, Surabaya, Indonesia
3. Student of Doctoral Program, Faculty of Dental Medicine, Universitas Airlangga, Surabaya, Indonesia
4. Department of Community Oral Health & Clinical Prevention, Faculty of Dentistry, University of Malaya, Malaysia