Objective: To explore relationship between the chromosome fragility sites and clinical situation among mentally retardation children.
目的：探讨智力低下儿童染色体脆性部位与临床表现的关系。
Objective: To explore relationship between the chromosome fragility sites and clinical situation among mentally retardation children.
目的：探讨智力低下儿童染色体脆性部位与临床表现的关系。
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