1. Interuniversity Institute for Biostatistics and statistical Bioinformatics, Hasselt University, Hasselt, Belgium
2. Centre for Health Economic Research and Modelling Infectious Diseases, Vaccine and Infectious Disease Institute (WHO Collaborating Centre), University of Antwerp, Antwerp, Belgium
3. Centre for the Evaluation of Vaccination, Vaccine and Infectious Disease Institute (WHO Collaborating Centre), University of Antwerp, Antwerp, Belgium
4. Laboratory of Medical Microbiology, Vaccine and Infectious Disease Institute (WHO Collaborating Centre), University of Antwerp, Antwerp, Belgium
5. School of Public Health and Community Medicine, The University of New South Wales, Sydney, Australia