He is a clinical epidemiologist with more than 20 years of experience in observational research, clinical trial analysis, and medical technology assessment and has co-authored more than 100 papers in the medical literature. Recent studies include early-stage cost-effectiveness analyses of medical devices and tests, trial-based economic evaluations, economic evaluations in the Diagnostics Assessment programme of the National Institute for Health and Clinical Excellence (NICE, UK) and outcomes research studies to determine the effectiveness and cost-effectiveness of expensive medicines in daily practice. Most studies relate to diabetes, cardiovascular disease, and cancer, and most studies involve modelling and evidence synthesis.