1. Interuniversity Institute for Biostatistics and statistical BioinformaticsHasselt University Diepenbeek Belgium
2. Interuniversity Institute for Biostatistics and statistical BioinformaticsKatholieke Universiteit Leuven Leuven Belgium
3. Centre for Health Economics Research and Modeling Infectious DiseasesCentre for the Evaluation of Vaccination, Vaccine & Infectious Disease Institute (WHO Collaborating Centre), University of Antwerp Antwerp Belgium