?:authorAffiliation
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[\'School of Nursing, Hangzhou Normal University, Hangzhou, China.\', \'Department of Clinical Medicine, School of Clinical Medicine, Hangzhou Normal University, Hangzhou, China.\', \'The Obstetrical Department of the First People\'s Hospital of Yunnan Province, The Affiliated Hospital of Kunming University of Science and Technology, Kunming, China.\', \'Anhui Provincial Maternal and Child Health Hospital, Shushan District, Hefei City, Anhui Province, China.\', \'Department of Preventive Medicine, School of Public Health, Hangzhou Normal University, Hangzhou, China.\']
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