?:authorAffiliation
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[\'Department of Paediatric Medical Center, Affiliated Hospital of Qingdao University, 16 Jiangsu Road, Qingdao, 266003, Shandong, China.\', \'Department of Paediatric Medical Center, Affiliated Hospital of Qingdao University, 16 Jiangsu Road, Qingdao, 266003, Shandong, China. sunlr@vip.sina.com.\']
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