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van der Heide HJ, Schutte B, Louwerens JW, van den Hoogen FH, Malefijt MC.van der Heide HJ, et al. Among authors: louwerens jw.Acta Orthop. 2009 Aug;80(4):440-4. doi: 10.3109/17453670903153568.Acta Orthop. 2009.PMID: 19634020Free PMC article.