. 2014 Sep 11;111(9):1703–1709. doi: 10.1038/bjc.2014.468
Copyright © 2014 Cancer Research UK
From twelve months after its original publication, this work is licensed under the Creative Commons Attribution-NonCommercial-Share Alike 3.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-sa/3.0/
Figure 1.
Consort flow diagram.