1. Department of Plant Pathology Washington State University Pullman Washington USA
2. Department of Plant, Soil and Microbial Sciences Michigan State University East Lansing Michigan USA
3. W.K. Kellogg Biological Station, Department of Integrative Biology Michigan State University Hickory Corners Michigan USA
4. Laboratory of Environmental Microbiology Institute of Microbiology of the Czech Academy of Sciences Prague Czech Republic
5. Biological Sciences Division, Earth and Biological Sciences Directorate Pacific Northwest National Laboratory Richland Washington USA
6. Department of Plant Sciences University of California Davis Davis California USA