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Kruithof E, Van den Bosch F, Baeten D, Herssens A, De Keyser F, Mielants H, Veys EM.Kruithof E, et al. Among authors: veys em.Ann Rheum Dis. 2002 Mar;61(3):207-12. doi: 10.1136/ard.61.3.207.Ann Rheum Dis. 2002.PMID: 11830424Free PMC article.