I look forward to using the HSCL-20 questionnaire to monitor the evolution of depressive symptoms in a research project. This scale is widely used in US clinical trials on disease management models for depression. But I'm not sure if this is a validated tool separately from the SCL-90. Besides, I do not know if there is a Spanish version of this questionnaire (I am aware of the Spanish version of the SCL-90, but not the independent subscale for depression: HSCL 20). Dear colleagues, I request your experience and knowledge.

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