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Meuffels DE, Potters JW, Koning AH, Brown CH Jr, Verhaar JA, Reijman M.Meuffels DE, et al. Among authors: verhaar ja.Acta Orthop. 2011 Dec;82(6):699-703. doi: 10.3109/17453674.2011.623566. Epub 2011 Oct 17.Acta Orthop. 2011.PMID: 21999625Free PMC article.