1. Swiss Federal Research Institute; WSL; Birmensdorf Switzerland
2. Oeschger Centre for Climate Change Research; Bern Switzerland
3. Institute for Forest Growth IWW; University of Freiburg; Freiburg Germany
4. Iceland Forest Service; Reykjavik Iceland
5. Department of Plant Pathology; University of Minnesota; St. Paul Minnesota USA
6. V.N.Sukachev Institute of Forest SB RAS; Krasnoyarsk Russia