Date	Event	Description
22 May 2020	New search has been performed	Updated search run. No new included studies identified. Two new excluded studies identified.
22 May 2020	New citation required but conclusions have not changed	Updated search run. No new included studies identified. Two new excluded studies identified. New author has joined the review team. Text updated to reflect current Cochrane standards, including addition of 'Summary of findings' table and GRADE assessment. No change to conclusions.