If Steel was routinely sleeping for four hours a night, she would be drastically underestimating the negative impact, says Alison Gardiner, founder of the sleep improvement programme Sleep station.

睡眠改善项目“睡眠站”的创始人艾莉森·加德纳说，如果斯蒂尔通常每晚只睡4个小时，她就大大低估了其负面影响。

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If you have tried various treatments with your primary care physician and are still not making much improvement, then you should ask for a referral or seek out a sleep specialist.

如果你已经和你的主治医师一起尝试了各种疗法，但依旧没有任何进展的话，你该申请转诊或者去看睡眠专家。

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Most of the studies measure patients' subjective assessment of their sleep improvement instead of objective evidence from a sleep lab, he adds.

WSJ: Can a Root Get to the Problem of Insomnia?

Vanda Pharmaceuticals said the trial would last six months and aim to show an improvement in total sleep time.

FORBES: Helping Blind Patients To Sleep