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Terluin , B , van Marwijk , H W J , Adèr , H J , de Vet , H C W , Penninx , B W J H , Hermens , M L M , van Boeijen , C A , van Balkom , A J L M , van der Klink , J J L & Stalman , W A B 2006 , ' The Four-Dimensional Symptom Questionnaire (4DSQ) : A validation study of a multidimensional self-report questionnaire to assess distress, depression, anxiety and somatization ' , BMC Psychiatry , vol. 6 , 34 . https://doi.org/10.1186/1471-244X-6-34.
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2006