Forest Research, Alice Holt Lodge, Slovak Academy of Sciences, Estonian University of Life Sciences, Forestry and Forest Products Research Institute, University of Pretoria, University of Agriculture in Krakow, I. P. and GREEN-IT Bioresources for Sustainability, Federal Research Centre the Subtropical Scientific Centre of the Russian Academy of Sciences - Department of Plant Protection, Bavarian State Institute of Forestry, University of Florence, Austrian Research Centre for Forests BFW, Swedish University of Agricultural Sciences (SLU) - Southern Swedish Forest Research Centre, Ukrainian Research Institute of Forestry & Forest Melioration, Estonian University of Life Sciences, Centro de Investigación Forestal (INIA-CIFOR), Julius Kuehn Institute, Scion, Bulgarian Academy of Sciences, University of Florence, Ministère de l’Agriculture et de l’Alimentation, Instituto Vasco de Investigación y Desarrollo Agrario, Estonian University of Life Sciences, Nature Research Centre, Instituto Vasco de Investigación y Desarrollo Agrario, Slovenian Forestry Institute, Çankırı Karatekin University, Slovenian Forestry Institute, National Institute for Agricultural and Food Research and Technology (INIA), Nature Research Centre, Instituto Nacional de Investigación y Tecnologia Agraria, Finnish Food Authority, Bavarian State Institute of Forestry, Mendel University in Brno and Mendel University in Brno