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. 2011 Oct 5;2011(10):CD003439. doi: 10.1002/14651858.CD003439.pub2
Date Event Description
23 August 2011 New citation required but conclusions have not changed One new author (AW) and two authors of first version removed (see Acknowledgements).
23 August 2011 New search has been performed Review updated with addition of 10 new studies. Conclusions remain the same