1. Dipartimento Agricoltura, Ambiente e Alimenti, Università degli Studi del Molise, Via Francesco De Sanctis, 86100 Campobasso, Italy.
2. Centro di Ricerca per le Aree Interne e gli Appennini (ArIA), Università degli Studi del Molise, via Francesco De Sanctis 86100 Campobasso, Italy.
3. Swiss Federal Institute for Forest, Snow and Landscape Research WSL. Zürcherstrasse 111 CH-8903 Birmensdorf, Switzerland.
4. Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria, Ctra. A Coruña, 7.5 Km, 28040, Madrid, Spain.
5. Southern Swedish Forest Research Center, Swedish University of Agricultural Sciences Sundsvägen 3, Box 49, 230 53 Alnarp.
6. Université de Lorraine, AgroParisTech, INRA, UMR Silva, Nancy, France.
7. Faculty of Forestry, Technical University in Zvolen, Slovakia.
8. SwissForestLab, CH-8903 Birmensdorf, Switzerland.
9. Biotechnical Faculty, Department of Forestry and Renewable Forest Resources, Jamnikarjeva ulica 101, SI-1000 Ljubljana, Slovenia.
10. Department of Forest Biodiversity. University of Agriculture. Al. 29-Listopada 46. 31-425 Krakow, Poland.
11. Facoltà di Scienze e Tecnologie, Libera Università di Bolzano, Piazza Università 1, 39100, Bolzano/Bozen, Italy.