1. David S. Robertson is a Senior Research Associate, MRC Biostatistics Unit, University of Cambridge, Cambridge, UK
2. Kim May Lee is a Research Fellow, King’s College London, London, UK
3. Boryana C. López-Kolkovska is a Statistical Science Associate Director at AstraZeneca, Cambridge, UK
4. Sofía S. Villar is an MRC Investigator, MRC Biostatistics Unit, University of Cambridge, Cambridge, UK