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Background of studies (Chinese only) Research team members (Chinese only) Contact information (Chinese only) Research design (Chinese only) Demographic profile of respondents (Chinese only) Frequency tables (Chinese only) Full questionnaires (Pdf format only) Presentations in press conference provided by project sponsor Survey results (Pdf format only)  Analysis of specialist in Dentistry(Pdf format only) Appendix : press release prepared by project sponsor (Pdf format only)