Funding for this research was provided by:
Cancer Research UK (C47114A / A16662)
Received: 31 July 2019
Accepted: 30 January 2020
First Online: 7 February 2020
Ethics approval and consent to participate
: This study was approved by the West of Scotland Research and Ethics Committee (reference 12/WS/0075). Approvals to use the data were obtained from the West of Scotland Critical Care Research Network, SICSAG and the West of Scotland Cancer Surveillance Unit.
: All authors approved the final version of the manuscript to be published.
: The authors declare that they have no competing interests.