Funding for this research was provided by:
National Cancer Institute (P30 CA023074)
Medical Research Council (MRC)/National Institute for Health Research (NIHR) UK
Received: 5 June 2018
Accepted: 31 August 2018
First Online: 5 November 2018
: Dr. Bell is a professor of biostatistics and the Graduate Inter-Disciplinary Program at the University of Arizona, USA. She is an adjunct lecturer at the School of Psychology at the University of Sydney, Australia.
: Approval is not needed, as this is a commentary containing no data.
: Not applicable.
: The author declares that she has no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.