| http://www.w3.org/ns/prov#value | - Insomnia is defined by difficulty falling asleep, difficulty staying asleep, nonrestorative sleep, and waking symptoms such as fatigue, impaired concentration, and mood disturbance.1,2 The prevalence of insomnia is approximately 5% to 20% in the general adult population3 and 20% to 30% in primary care medical settings.4,5 Insomnia is commonly comorbid with physical and mental disorders6 and chroni
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