BMC Psychiatry

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The Four-Dimensional Symptom Questionnaire (4DSQ): a validation study of a multidimensional self-report questionnaire to assess distress, depression, anxiety and somatization

Berend Terluin*, Harm WJ van Marwijk, Herman J Adèr, Henrica CW de Vet, Brenda WJH Penninx, Marleen LM Hermens, Christine A van Boeijen, Anton JLM van Balkom, Jac JL van der Klink and Wim AB Stalman

BMC Psychiatry 2006, 6:34 doi:10.1186/1471-244X-6-34

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