Date	Event	Description
8 April 2014	New citation required and conclusions have changed	This review has been updated; the following new studies have been incorporated (Brown 2007; Coddington 2009; Diamond 2003; DiZerega 2007a; Fossum 2011; Hellebrekers 2009; Lundorff 2005; Mais 2006; Mettler 2008; Rose 1991; Sites 1997; Ten Broek 2012; Thornton 1998; Trew 2011; Young 2005). The conclusions were changed.
7 November 2008	Amended	Converted to new review format.
13 January 2006	New citation required and conclusions have changed	Substantive amendment