Excessive daytime sleepiness (EDS) is not invariably present in patients with obstructive sleep apnoea syndrome (OSAS).

阻塞性睡眠暂停综合症患者呈现的日间嗜睡过多（EDS）不是一成不变的。

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Explained below are some of the common disorders keeping us awake at night: snoring, sleep apnoea, insomnia and restless leg syndrome.

下面将介绍一些打扰我们睡眠的常见原因：打鼾，睡眠呼吸暂停，失眠和不宁腿综合症。

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Among the conditions examined by the St Thomas' team were obstructive sleep apnoea (OSA) and restless leg syndrome (RLS).

BBC: NEWS | Health | Genes to blame for restless sleep