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2. Determining dental checkup frequency;Woolfolk;JADA,1999
3. Factors associated with use of preventive dental and health services among U.S. adolescents;Yu;J Adolesc Health,2001
4. The impact of income on children's and adolescents' preventive dental visits;Watson;JADA,2001
5. An analysis of dental visits in U.S. children, by category of service and sociodemographic factors, 1996;Macek;Pediatr Dent,2001