1. Population Health Sciences, Bristol Medical School University of Bristol UK
2. Department of Basic Psychology and Methodology, Faculty of Psychology University of Murcia Murcia Spain
3. Statistical and Health Economic Modelling, Population Health Sciences, Bristol Medical School University of Bristol Bristol UK
4. School of Psychological Science University of Bristol Bristol UK
5. MRC Integrative Epidemiology Unit at the University of Bristol Bristol UK
6. Health Economics and Decision Science, School of Health and Related Research University of Sheffield Sheffield UK