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1Division of Health and Nutrition Survey and Analysis, Bureau of Chronic Disease Prevention and Control, Korea Disease Control and Prevention Agency, Cheongju, Korea
2Division of Healthcare Association Infection Control, Bureau of Healthcare Safety and Immunization, Korea Disease Control and Prevention Agency, Cheongju, Korea
3Public Health Medical Service Office, Chungnam National University Hospital, Daejeon, Korea
4Korea Disease Control and Prevention Agency, Cheongju, Korea
©2021, Korean Society of Epidemiology
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