Issa Dahabreh, MD ScD, is Associate Professor of Epidemiology and Biostatistics at the Harvard T.H. Chan School of Public Health, and Section Head for Epidemiology and Data Science at the Richard A. and Susan F. Smith Center for Outcomes Research. His research develops methods for causal inference, evidence synthesis, and the use of trial and external data to improve the design and analysis of studies informing clinical and public health decisions.