title: The nature of insomnia: a descriptive summary of a sleep clinic population.
mesh_terms: D000328:Adult; D003863:Depression / Q000150:complications; D005260:Female; D006801:Humans; D006998:Hypochondriasis / Q000150:complications; D007046:Hysteria / Q000150:complications; D008950:MMPI; D008297:Male; D008875:Middle Aged; D010551:Personality; D012647:Self-Assessment; D007319:Sleep Initiation and Maintenance Disorders / Q000150:complications; D013997:Time Factors; D014851:Wakefulness