?:authorAffiliation
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[\'Guangdong Provincial Institute of Public Health, Guangdong Provincial Centre for Disease Control and Prevention, Guangzhou, China.\', \'The First Hospital of Foshan, Foshan, China.\', \'The Guangdong Second Provincial General Hospital, Guangzhou, China.\', \'Guangdong Provincial Centre for Disease Control and Prevention, Guangzhou, China.\', \'The First Hospital of Foshan, Foshan, China. Electronic address: jz.tian@163.com.\', \'Guangdong Provincial Centre for Disease Control and Prevention, Guangzhou, China. Electronic address: kecw1965@aliyun.com.\']
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