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Ji CY, Yt Sung R, Ma GS, Ma J, He ZH, Chen TJ.Ji CY, et al.Biomed Environ Sci. 2010 Feb;23(1):12-20. doi: 10.1016/s0895-3988(10)60026-8.Biomed Environ Sci. 2010.PMID: 20486431
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