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Keyzer-Dekker CM, Houtkamp RG, Peterse JL, Van Coevorden F.Keyzer-Dekker CM, et al. Among authors: houtkamp rg.Sarcoma. 2004;8(1):19-24. doi: 10.1080/13577140410001679211.Sarcoma. 2004.PMID: 18521389Free PMC article.