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You searched for: Author/Creator Zitman, Frans G.

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1. Age-related characteristics of outpatients with anxiety disorders: the Leiden routine outcome monitoring study. (2nd October 2017)

4. Concordance between self‐reported and observer‐rated anxiety severity in outpatients with anxiety disorders: The Leiden routine outcome monitoring study. (24th July 2017)

7. Evaluating the Responsiveness to Therapeutic Change with Routine Outcome Monitoring: A Comparison of the Symptom Questionnaire‐48 (SQ‐48) with the Brief Symptom Inventory (BSI) and the Outcome Questionnaire‐45 (OQ‐45). (9th October 2015)

10. Reference values for mental health assessment instruments: objectives and methods of the Leiden Routine Outcome Monitoring Study. Issue 2 (14th February 2012)