1. Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, 1700 Fribourg, Switzerland
2. Department of Wood Science, The University of British Columbia, 2424 Main Mall, Vancouver, British Columbia V6T 1Z4, Canada
3. Department of Chemical and Biological Engineering, The University of British Columbia, 2360 East Mall, Vancouver, British Columbia V6T 1Z3, Canada
4. Department of Materials Science & Engineering, Universitat Politècnica de Catalunya Av. Eduard Maristany 16, 08019 Barcelona, Spain