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Ranhee Kim, Ji Man Kim, Chong Yon Park, Keun-Young Park, Changwoo Lee, and Euichul Shin Graduate School of Public Health, The Catholic University of Korea, Seoul, Korea Seoul Dental Hospital for the Disabled, Seoul, Korea Health Insurance Review and Assessment Service, Wonju, Korea National Evidence-Based Healthcare Collaborating Agency, Seoul, Korea Department of Preventive Medicine, The Catholic University of Korea College of Medicine, Seoul, Korea

Regional Variations and Related Factors of Mastication Difficulty Rate among the Korean Elderly