1. MicroLife Solutions B.V., Science Park 406, 1098 XH Amsterdam, the Netherlands
2. National Institute for Public Health and the Environment (RIVM), Centre for Infectious Diseases, Epidemiology and Surveillance, Endemic and Emerging Viruses section, Antonie van Leeuwenhoeklaan 9, 37221 MA Bilthoven, the Netherlands
3. Department of Microbial Ecology, Netherlands Institute of Ecology (NIOO-KNAW), PO BOX 50, 6700 AB Wageningen, the Netherlands
4. BioDetection Systems B.V., Science Park 406, 1098 XH Amsterdam, the Netherlands
5. Soil Biology Group, Wageningen University and Research Centre (WUR), PO BOX 47, 6700 AA Wageningen, the Netherlands