. 2018 Sep 11;119(5):646–656. doi: 10.1038/s41416-018-0240-5
© Cancer Research UK 2018
Note: This work is published under the standard license to publish agreement. After 12 months the work will become freely available and the license terms will switch to a Creative Commons Attribution 4.0 International (CC BY 4.0).
Fig. 1.
Flowchart of study participants