［作者简介］汪俊(1969-)，女，主治医师
汪俊（上海第二医科大学附属第九人民医院儿童口腔科，上海　200011
上海第二医科大学口腔医学院儿童口腔科，上海　200011）
刘正（上海第二医科大学附属第九人民医院儿童口腔科，上海　200011
上海第二医科大学口腔医学院儿童口腔科，上海　200011）

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