Date	Event	Description
28 March 2012	New citation required and conclusions have changed	Five records were identified from the updated search: one new study was included (Mousavi 2012); three records were added to previously included studies (Lertkhachonsuk 2009a; Rahimi-Moghaddam 2004; Osborne 2011a); one record was added to ‘Ongoing studies’ section (GOG 0275). Previously included non-RCTs (Abrao 2008; Kohorn 1996; Smith 1982; Wong 1985) were excluded. Conclusions updated.
14 February 2012	New search has been performed	Electronic database search updated rendering 964 records after de-duplication
11 February 2009	Amended	Acknowledgements amended.
14 April 2008	Amended	Converted to new review format.
27 January 2008	New citation required and major changes	Substantive amendment