?:authorAffiliation
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[\'Department of Public Health, Graduate School, Yonsei University, Seoul 03722, Korea.\', \'Institute of Health Services Research, Yonsei University, Seoul 03722, Korea.\', \'Department of Preventive Medicine, Yonsei University College of Medicine, Seoul 03722, Korea.\', \'Department of Pediatrics, Severance Children\'s Hospital, Yonsei University College of Medicine, Seoul 03722, Korea.\']
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