1. National Institute for Research and Development in Forestry “Marin Drăcea”, Eroilor Avenue 128, 077190 Voluntari, Romania
2. Slovenian Forestry Institute, Večna pot 2, 1000 Ljubljana, Slovenia
3. Plant Health and Research Service—ERSA, Via Sabbatini 5, 33050 Pozzuolo Del Friuli, Italy
4. BIOGECO, INRAE, University Bordeaux, 33612 Cestas, France
5. Department of Forest Protection, Forest Research Institute, University of Sopron, 18 Hegyalja Str., 3232 Mátrafüred, Hungary
6. University of Belgrade-Faculty of Forestry, Str. Kneza Viseslava 1, 11030 Belgrade, Serbia
7. Department for Forest Protection, BFW—Austrian Research Centre for Forests, Seckendorff-Gudent-Weg 8, 1131 Vienna, Austria
8. Faculty of Forestry and Wood Technology, University of Zagreb, Svetosimunska cesta 23, 10000 Zagreb, Croatia
9. Croatian Forest Research Institute, Cvjetno naselje 41, 10450 Jastrebarsko, Croatia
10. Forest Research, Alice Holt Lodge, Farnham GU10 4LH, UK
11. Flanders Research Institute for Agriculture, Fisheries and Food (ILVO), Burg. Van Gansberghelaan 96, 9820 Merelbeke, Belgium