1. Molecular Genetics, Groningen Biomolecular Sciences and Biotechnology Institute, University of Groningen, Groningen, the Netherlands
2. Plant Physiology, Groningen Institute for Evolutionary Life Sciences, University of Groningen, Groningen, the Netherlands
3. HLB Research & Consultancy in Agriculture, Wijster, the Netherlands
4. Microbial Ecology, Groningen Institute for Evolutionary Life Sciences, University of Groningen, Groningen, the Netherlands