Date	Event	Description
9 January 2017	New citation required but conclusions have not changed	Our conclusions remain unchanged and up‐to‐date.
9 January 2017	New search has been performed	Searches updated. We identified 199 records but none were included in the meta‐analyses. One study awaiting classification has since been published (ACTRN12610000916044 2013 has been published as Clancy 2016). There are otherwise two studies awaiting classification that remain in the trial phase.