title: Active and placebo effects in treatment of moderate and severe insomnia.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001288:Attention; D003887:Desensitization, Psychologic; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012064:Relaxation Therapy; D007319:Sleep Initiation and Maintenance Disorders / Q000188:drug therapy*