title: Nonrestorative sleep: a useful indicator of insomnia with a wide range of prevalence.
authors.forename: Tomoyuki
authors.initials: T
authors.lastname: Kawada
mesh_terms: D005260:Female; D006801:Humans; D008297:Male; D012890:Sleep / Q000502:physiology*; D007319:Sleep Initiation and Maintenance Disorders / Q000453:epidemiology* / Q000503:physiopathology*; D014851:Wakefulness / Q000502:physiology*