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Yang NP, Jen I, Chuang SY, Chen SH, Chou P.Yang NP, et al. Among authors: chuang sy.BMC Musculoskelet Disord. 2006 Mar 9;7:24. doi: 10.1186/1471-2474-7-24.BMC Musculoskelet Disord. 2006.PMID: 16526954Free PMC article.