I am Professor of Statistical and Health Economic Modelling in the department of Population Health Sciences at the University of Bristol, where I lead the Multi-Parameter Evidence Synthesis research group. I am the Director of the NICE Clinical Guidelines Technical Support Unit and a member of the NICE Technical Appraisals committee. My research interests include: methods for evidence synthesis in health technology assessment, network meta-analysis, extrapolating survival curves, bias adjustment in evidence synthesis, use of evidence in economic models, and value of information analysis. I am co-author of two books: “Evidence Synthesis for Decision Making in Healthcare” and “Network Meta-Analysis for Comparative Effectiveness Research”. I have co-authored the NICE Decision Support Unit Technical Support Documents series on Evidence Synthesis.