1. Department of Fibre and Polymer Technology, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, 100 44 Stockholm, Sweden
2. Avecom NV, Industrieweg 122 P, Wondelgem 9032, Belgium
3. Center for Microbial Ecology and Technology, University of Gent, Coupure Links 653, Gent 9000, Belgium
4. Structural and Fire Engineering Division, Department of Civil, Environmental and Natural Resources Engineering, Luleå University of Technology, Luleå 97187, Sweden