1. Parasitology Section, Department of Medical Microbiology, Center for Infection and Immunity Amsterdam (CINIMA), Academic Medical Center, Amsterdam, The Netherlands
2. Department of Medical Microbiology, Maaslandziekenhuis, Sittard, The Netherlands
3. Cluster Environment and Public Health, Municipal Health Service, Amsterdam, The Netherlands
4. Department of Human Ecology, Vrije Universiteit Brussel, Brussels, Belgium