1. Department of Mechanics, KTH Royal Institute of Technology, Stockholm 100 44, Sweden
2. Wallenberg Wood Science Center, KTH Royal Institute of Technology, Stockholm 100 44, Sweden
3. Deutsches Elektronen-Synchrotron DESY, Hamburg 22607, Germany
4. Department of Applied Physics, KTH Royal Institute of Technology, Stockholm 164 40, Sweden
5. Jülich Centre for Neutron Science at MLZ, Forschungszentrum Jülich GmbH, Garching 52428, Germany
6. Fibre and Polymer Technology, KTH Royal Institute of Technology, Stockholm 100 44, Sweden