1. VTT Technical Research Centre of Finland Ltd., P. O. Box 1603, FI-02150 Espoo, Finland
2. Department of Bioproducts and Biosystems, School of Chemical Engineering, Aalto University, FI-00076 Espoo, Finland
3. Departments of Chemical & Biological Engineering, Chemistry, and Wood Science, The University of British Columbia, 2360 East Mall, 2036 Main Mall, and 2424 Main Mall, Vancouver, British Columbia V6T 1Z3, Canada