Dr. G.J. Melendez-Torres is a Senior Statistician with the GPI. He is a Professor of Clinical and Social Epidemiology at the University of Exeter, where he leads the School for Public Health Environments Research at Exeter and the Peninsula Technology Assessment Group. An experienced trial statistician and evaluator of complex interventions, he has published 120 peer-reviewed articles, most of which use advanced statistical and epidemiological methods to answer questions about the effectiveness and cost-effectiveness of complex interventions.