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Test–retest reliability and validity of the Pittsburgh Sleep Quality Index in primary insomnia

ReliabilitySleep MedicineSleepSleep HealthSleep DisordersSleep DisorderPsychiatrySleep PhysiologyInsomniaSleep DeprivationMedicineSleep RoutinesTest–retest ReliabilitySleep QualitySocial SciencesSleep PsychologyPrimary Insomnia