Difficulties initiating and maintaining sleep (DIMS) are frequent features of autism, yet little is known about why these conditions co-occur. One possibility is that they share etiological factors, yet this hypothesis remains to be tested using quantitative genetic designs. We thus investigated etiological links between autism and DIMS using familial co-aggregation and twin methods.

中文翻译：

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自闭症与开始和维持睡眠困难之间的病因学联系：家族共同聚集和双胞胎研究

难以启动和维持睡眠 (DIMS) 是自闭症的常见特征，但对于这些情况同时发生的原因知之甚少。一种可能性是它们有共同的病因，但这一假设仍有待使用定量遗传设计进行检验。因此，我们使用家族共聚集和双胞胎方法研究了自闭症和 DIMS 之间的病因联系。