title: Subjective characteristics of sleep in the elderly.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D005260:Female; D006801:Humans; D006993:Hypnotics and Sedatives / Q000627:therapeutic use; D008297:Male; D012647:Self-Assessment; D012737:Sex Factors; D012890:Sleep / Q000187:drug effects; D012893:Sleep Wake Disorders / Q000188:drug therapy / Q000209:etiology; D013997:Time Factors; D014851:Wakefulness
chemical_list: D006993:Hypnotics and Sedatives