1. Chair of Silviculture and Forest Ecology, Institute of Forestry and Rural Engineering, Estonian University of Life Sciences, Tartu, Estonia
2. Chair of Forest Management Planning and Wood Processing Technologies, Institute of Forestry and Rural Engineering, Estonian University of Life Sciences, Tartu, Estonia
3. Center for Forest Disturbance Science, US Forest Service, Athens, USA
4. Norwegian Institute of Bioeconomy Research, Ås, Norway