. 2018 Nov 20;144(3):641–650. doi: 10.1002/ijc.31913
© 2018 The Authors. International Journal of Cancer published by John Wiley & Sons Ltd on behalf of UICC.
This is an open access article under the terms of the http://creativecommons.org/licenses/by-nc/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.
Figure 1.
Accrual and retention of participants