1. Singidunum University—Environment and Sustainable Development Belgrade Serbia
2. Department of Forest Biodiversity, Faculty of Forestry University of Agriculture in Kraków Kraków Poland
3. Forest Research Institute at the Bulgarian Academy of Sciences Sofia Bulgaria
4. Umeå University Umeå Sweden
5. Université Rennes 2/UMR LETG Rennes France
6. The Kostrzyca Forest Gene Bank Miłków Poland
7. Isparta University of Applied Sciences Isparta Turkey
8. CSIC—INIA—CIFOR Madrid Spain
9. Slovenian Forestry Institute Ljubljana Slovenia
10. Pyrenean Institute of Ecology (Spanish National Research Council; IPE‐CSIC) Zaragoza Spain
11. CREA—Research Centre for Forestry and Wood Casale Monferrato AL Italy
12. WWF Bulgaria Sofia Bulgaria
13. Forest Economics Department Düzce University, Faculty of Forest Düzce Turkey
14. Croatian Forest Research Institute Jastrebarsko Croatia
15. School of Biology and Environmental Science University College Dublin Dublin Ireland
16. Edmund Mach Foundation Trento Italy
17. University of Belgrade—Faculty of Forestry Belgrade Serbia
18. CITA (Agricultural Research Centre) Aragon Spain
19. School of Natural Sciences—University of Patras Rio Greece
20. INRAE—ONF—BioForA Orléans France
21. University of Forestry Sofia Bulgaria
22. Forest Research Centre—School of Agriculture—University of Lisbon Lisbon Portugal