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Chaparro LE, Smith SA, Moore RA, Wiffen PJ, Gilron I.Chaparro LE, et al. Among authors: wiffen pj.Cochrane Database Syst Rev. 2013 Jul 24;2013(7):CD008307. doi: 10.1002/14651858.CD008307.pub2.Cochrane Database Syst Rev. 2013.PMID: 23881791Free PMC article.Review.