1. Department of Forest Biomaterials and Technology, Swedish University of Agricultural Sciences, Umeå, Sweden
2. The Forestry Research Institute of Sweden (Skogforsk), Sävar, Sweden
3. Department of Forest and Environmental Engineering and Management, Polytechnic University of Madrid, Madrid, Spain
4. Slovenian Forestry Institute, Ljubljana, Slovenia
5. School of Forest Sciences, University of Eastern Finland, Faculty of Science and Forestry, Joensuu, Finland
6. University of Eastern Finland Faculty of Science and Forestry: Ita-Suomen Yliopisto Luonnontieteiden Ja Metsatieteiden Tiedekunta, Vantaa, Finland
7. Natural Resources Institute Finland (Luke), Joensuu, Finland
8. Biotechnical Faculty, Department of Forestry and Renewable Forest Resources, University of Ljubljana, Ljubljana, Slovenia