?:authorAffiliation
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[\'Centre of Clinical Epidemiology and Methodology, Guangdong Second Provincial General Hospital, Guangzhou, China.\', \'Centre of Clinical Epidemiology and Methodology, Guangdong Second Provincial General Hospital, Guangzhou, China; Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, Canada. Electronic address: lig28@mcmaster.ca.\', \'Center for Health Management and Examination, Guangdong Second Provincial General Hospital, Guangzhou, China.\', \'Hospital Laboratory, Guangdong Second Provincial General Hospital, Guangzhou, China.\', \'Centre of Clinical Epidemiology and Methodology, Guangdong Second Provincial General Hospital, Guangzhou, China. Electronic address: zhanggd2h@163.com.\']
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