1. Teagasc Forestry Development Department, Ashtown Research Centre, D15 DY05 Dublin, Ireland
2. The Forest Research Institute of Sweden (Skogforsk), Ekebo 2250, 268 90 Svalöv, Sweden
3. Department of Forestry and Wood Technology, Linnaeus University, Georg Lückligs väg 1, 352 52 Växjö, Sweden
4. Department of Forest Biomaterials and Technology, Swedish University of Agricultural Sciences, Vallvägen 9C, 756 51 Uppsala, Sweden