1. Institute of Chemistry, Technology and Metallurgy, National Institute of the Republic of Serbia, University of Belgrade, Belgrade 11000, Serbia.
2. Faculty of Forestry, University of Sarajevo, Sarajevo 71000, Bosnia and Herzegovina.
3. Department of Forest Ecology, Mendel University in Brno, Brno 613 00, Czech Republic.
4. Institute of Forest Sciences, Department of Silviculture, Warsaw University of Life Sciences, Warsaw 02-787, Poland.
5. Faculty of Forestry, Technical University in Zvolen, Zvolen 960 01, Slovakia.
6. Department of Agriculture and Forest Engineering (EAGROF), University of Lleida, Lleida 25198, Spain.
7. Joint Research Unit CTFC – AGROTECNIO, Universitat de Lleida, Lleida 25198, Spain.
8. Facoltà di Scienze e Tecnologie, Libera Università di Bolzano, Bolzano 39100, Italy.
9. Forest Research Center, INIA, CSIC, Madrid 28040, Spain.
10. Sustainable Forestry Management Research Institute (iuFOR), Universidad de Valladolid-INIA, Palencia 34071, Spain.
11. National Institute for Research and Development in Forestry ‘Marin Dracea’, Voluntari 077190, Romania.
12. Faculty of Pharmacy, University of Belgrade, Belgrade 11221, Serbia.
13. Biotechnical Faculty, Department of Forestry and Renewable Forest Resources, University of Ljubljana, Ljubljana 1000, Slovenia.
14. Institute of Forestry, Kneza Viseslava 3, Belgrade 11000, Serbia.
15. Department of Forest Ecology and Silviculture, University of Agriculture in Krakow, Krakow 31-425, Poland.
16. Institute for Technology of Nuclear and Other Mineral Raw Materials, Belgrade 11000, Serbia.
17. Faculty of Chemistry, University of Belgrade, Belgrade 11000, Serbia.
18. School of Life Sciences Weihenstephan, Chair of Forest Growth and Yield Science, Technical University of Munich, Freising 85354, Germany.
19. Bavarian State Institute of Forestry (LWF), Freising 85354, Germany.
20. Institute of Biodiversity and Ecosystem Research, Bulgarian Academy of Sciences, Sofia 1113, Bulgaria.
21. Dipartimento di Agricoltura, Ambiente e Alimenti, Università degli Studi del Molise, Campobasso 86100, Italy.
22. Centro di Ricerca per le Aree Interne e gli Appennini (ArIA), Università degli Studi del Molise, Campobasso 86100, Italy.
23. The EFI Project Centre on Mountain Forests (MOUNTFOR), Trento 38010, Italy.