Date	Event	Description
14 April 2016	New citation required and conclusions have changed	Newly available data on long‐term survival from CLVR and NETT and the inclusion of 2 new studies (Clarenbach 2015; Pompeo 2012) have led to changes in the conclusions provided in this updated review that further confirm the already reasonably positive findings of the original review.
14 April 2016	New search has been performed	The literature search was updated: 21 references were added to the NETT study. The previous review included the OBEST and CLVR studies as a single study (Miller 2005). However, review authors used only CLVR preliminary data. As the trial has been completed, we have separated the 2 individual studies in this version of the review and have incorporated additional data from CLVR (2 citations).