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The PHQ-9 Item 9 based screening for suicide risk: a validation study of the Patient Health Questionnaire (PHQ)−9 Item 9 with the Columbia Suicide Severity Rating Scale (C-SSRS)

Psychological Co-morbiditiesPsychiatrySuicideClinical PsychologyDepressionSocial SciencesMental HealthPublic HealthMedicineSuicide PreventionPatient Health QuestionnaireValidation StudyPsychopathologyPhq-9 Item 9