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Neumann I, Letelier LM, Rada G, Claro JC, Martin J, Howden CW, Yuan Y, Leontiadis GI.Neumann I, et al. Among authors: leontiadis gi.Cochrane Database Syst Rev. 2013 Jun 12;2013(6):CD007999. doi: 10.1002/14651858.CD007999.pub2.Cochrane Database Syst Rev. 2013.PMID: 23760821Free PMC article.Review.