University of Gottingen

Technical University of Munich

Beijing Forestry University

Wageningen University & Research

University of Helsinki

Swiss Federal Institute of Technology in Zurich

Northeast Forestry University

Swedish University of Agricultural Sciences

Nanjing Forestry University

The University of Queensland

University of British Columbia

Northwest A&F University

University of Sao Paulo

The University of Edinburgh

University of Cambridge

Oregon State University

Ghent University

University of Alberta

Colorado State University-Fort Collins

University of Minnesota, Twin Cities