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Toivanen A, Toivanen P.Toivanen A, et al. Among authors: toivanen p.Best Pract Res Clin Rheumatol. 2004 Oct;18(5):689-703. doi: 10.1016/j.berh.2004.05.008.Best Pract Res Clin Rheumatol. 2004.PMID: 15454127Review.