ObjectiveTo investigate the relationship between 48bp variant number tandem repeat (VNTR) polymorphism in the third exon of dopamine D 4 receptor(DRD 4) gene and attention deficit hyperactivity disorder (ADHD).

• 目的 探讨多巴胺D4受体 (dopamineD4receptor,DRD4 )基因 48bp可变重复序列 (variantnumbertandemrepeat,VNTR)多态性与注意缺陷多动障碍(Attention deficithyperactivitydisorder,ADHD)及其相关症状的关系。