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van Hout HP, Beekman AT, de Beurs E, Comijs H, van Marwijk H, de Haan M, van Tilburg W, Deeg DJ.van Hout HP, et al.Br J Psychiatry. 2004 Nov;185:399-404. doi: 10.1192/bjp.185.5.399.Br J Psychiatry. 2004.PMID: 15516548