Sonja Kroep is an Associate Director in the Modeling & Meta-Analysis Center of Excellence at OPEN Health. Her expertise lies in quantitative evidence synthesis and endpoint surrogacy analysis. Additionally, she is specialized in data analysis, with a particular emphasis on statistical models and survival analysis. Sonja holds an M.Sc. degree in Econometrics and Management Science, and a PhD in Public Health (Erasmus University Rotterdam, the Netherlands). She is currently leading the ITC service area within OPEN Health.