Category of submission: review A previous version of this study was presented at the 16th Presentation information: European Venous Forum meeting (2nd-4th July 2015) and Vascular Society Annual Scientific Meeting (11-13th November 2015). A repeat search has been conducted since and is submitted in this manuscript.
Category of submission: review Presentation information: A previous version of this study was presented at the 16th European Venous Forum meeting (2nd-4th July 2015) and Vascular Society Annual Scientific Meeting (11-13th November 2015). A repeat search has been conducted since and is submitted in this manuscript.