1. Department of Bioproducts and Biosystems, Aalto University, P.O. Box 16300, 00076 Aalto, Finland
2. VTT Technical Research Centre of Finland Ltd., P.O. Box 1000, FI-02044 Espoo, Finland
3. Department of Forest Biomaterials and Technology, Swedish University of Agricultural Sciences, Skogsmarksgränd, 90183 Umeå, Sweden