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Liang YW, Chen WY, Lee JL, Huang LC.Liang YW, et al. Among authors: chen wy.BMC Health Serv Res. 2012 Feb 20;12:44. doi: 10.1186/1472-6963-12-44.BMC Health Serv Res. 2012.PMID: 22348278Free PMC article.