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Li X, Sarkar SN, Purdy DE, Briggs RW.Li X, et al. Among authors: sarkar sn.Biomed Res Int. 2014;2014:108691. doi: 10.1155/2014/108691. Epub 2014 May 15.Biomed Res Int. 2014.PMID: 24949416Free PMC article.Clinical Trial.