?:authorAffiliation
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[\'Beijing Center for Disease Prevention and Control, Beijing, China.\', \'Beijing Research Center for Preventive Medicine, Beijing, China.\', \'School of Public Health, Capital Medical University, Beijing, China.\', \'Beijing YouAn Hospital, Capital Medical University, Beijing, China.\', \'Sinovac Biotech Co, Ltd, Beijing, China.\', \'Xicheng District Center for Disease Prevention and Control, Beijing, China.\']
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