Dr Tracy Glass is a statistician with 20 years of experience working in the fields of cancer and infectious diseases research. She is the head of the Clinical Statistics and Data Management group in the Medicine Department of the Swiss Tropical and Public Health Institute. Her interest lies in designing and conducting clinical trials at all phases of development. She has extensive experience with complex cluster trials in low-resource settings. Her research focuses on the causal modelling of observational data. She is an associate professor at the University of Basel and teaches several statistics courses at the post-graduate level. She has a Master of Science in Statistics from the University of Washington and a PhD in Epidemiology from the University of Basel.