1. Institute of Plant Sciences University of Bern Bern Switzerland
2. Department of Forest Ecology and Management Swedish University of Agriculture Sciences Umeå Sweden
3. Department of Forest Mycology and Plant Pathology, BioCenter Swedish University of Agricultural Sciences Uppsala Sweden
4. Department of Forest Genetics and Plant Physiology, Umeå Plant Science Center Swedish University of Agricultural Sciences Umeå Sweden
5. Department of Ecology and Environmental Science Umeå University Umeå Sweden
6. Center for Environmental and Climate Research Lund University Lund Sweden
7. Department of Microbial Ecology Lund University Lund Sweden