Date	Event	Description
1 February 2014	New search has been performed	Third update of first version published in 2003
1 February 2014	New citation required and conclusions have changed	Study selection criteria changed. Findings from new studies included. Conclusions changed. New review authors. Title changed from 'Surgery for obesity' to 'Surgery for weight loss in adults'.
20 July 2009	Feedback has been incorporated	Added four references to the 'SOS 1997‐2007' study that had previously been omitted from the reference list.
27 October 2008	New citation required and conclusions have changed	Substantive amendment
27 October 2008	New search has been performed	Title changed. Study selection criteria changed. Findings from new studies included. Authors changed.
15 August 2005	New citation required and conclusions have changed	Substantive amendment