1. Department of Production Systems, Natural Resources Institute Finland, Helsinki, Finland
2. Department of Production Systems, Natural Resources Institute Finland, Tampere, Finland
3. Faculty of Science and Forestry, School of Forest Sciences, University of Eastern Finland, Joensuu, Finland
4. Department of Production Systems, Natural Resources Institute Finland, Joensuu, Finland
5. Division of Forest and Forest Resources, Norwegian Institute for Bioeconomy Research, Ås, Norway