| Date | Event | Description |
|---|---|---|
| 9 January 2014 | Amended | minor text amendment |
| 10 September 2013 | New citation required and conclusions have changed | Conclusions updated, additional review authors joined the team. |
| 10 September 2013 | New search has been performed | Second update, new search; 18 trials added (Fischer 1984; Blair 1988; Wunderlich 1991; Bishop 1992; Fumal 2002b; Chaloner 2004; Jørgensen 2005; Meaume 2005; Münter 2006; Gethin 2008; Jull 2008; Lazareth 2008; Dimakakos 2009; Kuznetsov 2009; Michaels 2009; Binić 2010; Kerihuel 2010; Miller 2010). |
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