Lewis G Halsey1, Douglas Curran-Everett2,3, Sarah L Vowler4, Gordon B Drummond5. 1. Department of Life Sciences, University of Roehampton, London, UK. 2. Division of Biostatistics and Bioinformatics, National Jewish Health, Denver, Colorado, USA. 3. Department of Biostatistics and Informatics, Colorado School of Public Health, University of Colorado Denver, Denver, Colorado, USA. 4. Cancer Research UK Cambridge Institute, University of Cambridge, Cambridge, UK. 5. University of Edinburgh, Edinburgh, UK.