1. Soil Biology Group Wageningen University & Research Wageningen The Netherlands
2. Department of Soil Sciences Research Institute of Organic Agriculture (FiBL) Frick Switzerland
3. Department of Terrestrial Ecology Netherland Institute of Ecology Wageningen The Netherlands
4. Laboratory of Nematology Wageningen University & Research Wageningen The Netherlands
5. Biosystematics Group Wageningen University & Research Wageningen The Netherlands
6. Genetic Diversity Centre ETH Zürich Zürich Switzerland