求翻译：本研究为国际上较大数量的AD病例总结。17例中国AD患儿临床表型特点为：疾病进展速度较国外报道相对缓慢，病程中发作性加重较为常见，癫痫发生率高。本研究中的3种GFAP新突变丰富了已知的突变谱，外显子1为中国患者的热点突变区域。是什么意思？

In this study, a large number of international summary of the AD cases. 17 cases of Chinese children with AD is characterized by the clinical phenotype: rate of disease progression than those reported relatively slow onset of the increase in the duration of the more common, the high incidence of epi

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The study for the international case-summary of the large number of AD. 17 cases clinical phenotypes in children with Chinese AD features: reported relatively slow disease progress faster than abroad, in the course of attacks increase is more common, high incidence of epilepsy. In the study of the 3

The study for the international case-summary of the large number of AD. 17 cases clinical phenotypes in children with Chinese AD features: reported relatively slow disease progress faster than abroad, in the course of attacks increase is more common, high incidence of epilepsy. In the study of the 3