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MedicineEndocrinologyCircadian RhythmsPsychophysiologySleep MedicineFatigueSleep AssessmentSleep HealthFatigue EffectsFatigue PerceptionFatigue ReliefMelatonin SupplementationMelatonin Treatment
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The Hospital Anxiety and Depression Scale
A. S. Zigmond, R. P. Snaith · Acta Psychiatrica Scandinavica · 1983 · 46.6K citations
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