Date	Event	Description
16 November 2021	New citation required but conclusions have not changed	New author added. No new studies for inclusion
10 May 2021	New search has been performed	Updated search to 10 May 2021. Background updated
31 July 2013	New citation required but conclusions have not changed	The background and discussion have been updated to reflect recent literature in this area. 'Risk of bias' and 'Summary of findings' tables have been added. Change in authors.
12 July 2013	New search has been performed	Search updated to January 2013.
24 July 2008	New citation required but conclusions have not changed	Review updated and scope expanded to include all antibiotics and not just penicillins. Change in authors.
24 July 2008	New search has been performed	Search updated to June 2008.
24 June 2008	Amended	Converted to new review format.