1. Natural Resources Institute Finland (Luke), Yliopistokatu 6, P.O. Box 111, Joensuu, FI-80100, Finland
2. University of Eastern Finland (UEF), School of Forest Sciences, Yliopistokatu 7, P.O. Box 111, Joensuu, FI-80101, Finland
3. Natural Resources Institute Finland (Luke), Latokartanonkaari 9, P.O. Box 2, Helsinki, FI-00791, Finland