1. Research Student, Department of Health Sciences, University of Leicester, Leicester, UK
2. Lecturer of Population and Public Health Sciences, Department of Health Sciences, University of Leicester, Leicester, UK
3. Professor of Medical Statistics, Department of Health Sciences, University of Leicester, Leicester, UK
4. Research Associate, Department of Health Sciences, University of Leicester, Leicester, UK
5. Professor of Health Care Evaluation Research, Department of Health Sciences, University of Leicester, Leicester, UK