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Vrancken AF, Hughes RA, Said G, Wokke JH, Notermans NC.Vrancken AF, et al. Among authors: hughes ra.Cochrane Database Syst Rev. 2007 Jan 24;(1):CD006050. doi: 10.1002/14651858.CD006050.pub2.Cochrane Database Syst Rev. 2007.PMID: 17253577Review.