1. Laboratory of Medical Microbiology, Vaccine & Infectious Disease Institute (VAXINFECTIO), University of Antwerp, Antwerp, Belgium
2. Centre for General Practice, Vaccine & Infectious Disease Institute (VAXINFECTIO), University of Antwerp, Antwerp, Belgium
3. Department of Medical Microbiology, Leiden University Medical Center, Leiden, The Netherlands
4. Department of Pharmacoepidemiology, Norwegian Institute of Public Health, Oslo, Norway