Preventing depression in adolescents.  Interventions are most effective when targeted to youths most at risk.
D000293:Adolescent; D000367:Age Factors; D015928:Cognitive Behavioral Therapy; D003863:Depression / Q000453:epidemiology / Q000209:etiology / Q000517:prevention & control*; D006801:Humans; D012307:Risk Factors; D040242:Risk Reduction Behavior; D012890:Sleep