I obtained my PhD in mathematical statistics in 1997. Since I wanted to continue my career in an applied field of research, I was very happy to start as senior statistician at the public health service of Amsterdam. There I specialised in the analysis of data that are collected in cohort studies, i.c. the Amsterdam Cohort Studies on HIV infection and AIDS (https://amsterdamcohortstudies.org). I performed and supervised many studies on infectious agents, especially those that are transmitted via sexual contact. Besides, I worked in several (medical) statistical research groups in the Netherlands, most notably in the academic medical center in Amsterdam. I joined OUCRU in January 2017 and became associate professor at Oxford University.

My research interests include: i) models for complex time-to-event data (competing risks, multi-state models), ii) models for complex longitudinal data, iii) prediction based on time-updated marker values, iv) causal inference, v) infectious diseases.