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de Beurs E, Beekman AT, van Balkom AJ, Deeg DJ, van Dyck R, van Tilburg W.de Beurs E, et al. Among authors: beekman at.Psychol Med. 1999 May;29(3):583-93. doi: 10.1017/s0033291799008351.Psychol Med. 1999.PMID: 10405079Free article.