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. 2006 Jan 25;2006(1):CD002206. doi: 10.1002/14651858.CD002206.pub3
Date Event Description
14 November 2005 New search has been performed Minor update.
26 September 2005 New citation required and conclusions have changed Substantive amendment
18 August 2005 New citation required and conclusions have changed Conclusions changed.
3 August 2005 Amended New studies found and included or excluded