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Dr. Marieke van Leeuwen

Postdoctoral fellow


I attended the University of Amsterdam, where I received degrees in clinical psychology and medial biology. I received my Ph.D. from the VU University, Department of Biological Psychology. My Ph.D. thesis was on the heritability of cognition of pre-adolescents. My current work is focused on the health- related quality of life (HRQL) of cancer survivors. Recently, I've completed an international feasibility study of the HRQL of long-term survivors of testicular and prostate cancer who were treated in the context of EORTC phase III clinical trials. Currently, I'm developing and evaluating an internet-based cognitive behavioral therapy program to alleviate treatment-induced menopausal symptoms in patients with breast cancer.

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Dr. Jacobien Kieffer

Statistical analyst


My background is in psychological research methods, which I studied at the University of Amsterdam. I obtained my PhD from the Academic Centre of Dentistry (ACTA). My thesis was on methodological issues in oral health-related quality of life research. Throughout my career, I have always had a teacher and/ or advisory role. Therein also lies my interest in my current position as senior statistical analyst. It provides me with the opportunity to be involved in a range of projects and to work collaboratively with colleagues with varying backgrounds and levels of expertise.

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