1. University of Naples Federico II, Department of Agricultural Sciences, Portici (Naples), Italy
2. University of Ljubljana, Biotechnical Faculty, Department of Wood Science and Technology, Ljubljana, Slovenia
3. University of Campania Luigi Vanvitelli, Department of Environmental, Biological and Pharmaceutical Sciences and Technologies, Caserta, Italy
4. Ecole Pratique des Hautes Etudes (PALECO EPHE), Institut des Sciences de l’Evolution–Montpellier UMR 5554 CNRS, Université de Montpellier, Montpellier, France
5. Slovenian Forestry Institute, Ljubljana, Slovenia