1. CABI Delémont Switzerland
2. Swiss Federal Institute for Forest, Snow and Landscape Research WSL Birmensdorf Switzerland
3. Institute of Plant Sciences University of Bern Bern Switzerland
4. Institute of Agricultural Sciences ETH Zürich Zürich Switzerland
5. URZF, INRA Orléans France
6. USDA Horticultural Crops Research Unit Corvallis Oregon 97330 USA
7. Dorena Genetic Resource Center USDA Forest Service Cottage Grove Oregon 97424 USA
8. Private Forests Division Oregon Department of Forestry Salem Oregon 97310 USA