title: Insomnia and psychosocial crisis: two studies of Erikson's developmental theory.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D004532:Ego; D005260:Female; D006801:Humans; D008016:Life Change Events; D008297:Male; D008875:Middle Aged; D010553:Personality Development; D011581:Psychological Tests; D007319:Sleep Initiation and Maintenance Disorders / Q000523:psychology*