1. Reader in Anaesthesia and Honorary Consultant Anaesthetist, Imperial College London and Chelsea and Westminster Hospital.
2. Head of Department of Anaesthetics, Pain Medicine and Intensive Care, Campus Dean and Director of Research and Development for Chelsea and Westminster Hospital Trust, Imperial College London.
3. Senior Statistician.
4. Senior Trials Manager, Medical Research Council (MRC) Clinical Trials Unit, London, United Kingdom.
5. Director, MRC Biostatistics Unit, Cambridge, United Kingdom.