Date	Event	Description
20 January 2012	New search has been performed	The original search was performed in December 2006. We searched the databases until September 2011. We added search results from four Chinese databases. We included three new studies in the updated review (Biffi 2009; Parienti 2008; Wang 2006). The addition of the new studies provided new evidence that subclavian and internal jugular central venous access (CVA) routes had similar risks for catheter‐related complications in long‐term catheterization of cancer patients. Subclavian CVA routes were preferable to femoral CVA routes in short‐term catheterization because of lower risks of catheter colonization and thrombotic complications. In short‐term haemodialysis catheterization, femoral and internal jugular CVA routes had similar risks for catheter‐related complications, except internal jugular CVA routes were associated with higher risks of mechanical complications.
20 January 2012	New citation required and conclusions have changed	This review is an update of the previous Cochrane systematic review (Hamilton 2007), which included one randomized controlled trial (Merrer 2001). The previous authors Hamilton HC, Foxcroft D decided not to update the review; new authors (Ge X, Cavallazzi R, Li C, Pan SM, Wang YW, Wang F‐L) have updated this version. We updated the review into RevMan 5.1, which resulted in a slight change in the Methods section, and we included risk of bias and summary of findings tables.
23 January 2008	New search has been performed	Converted to new review format.
17 April 2007	Amended	Substantive amendment