1. Department of Bioproducts and Biosystems Aalto University P.O. Box 16300 FI-00076 Aalto Espoo Finland
2. Adolphe Merkle Institute Université de Fribourg Chemin des Verdiers 4 CH-1700 Fribourg Switzerland
3. Materials Chemistry Division Chemistry Department University of Helsinki A.I. Virtasen aukio 1, P.O. Box 55 FI-00014 Helsinki Finland
4. Omya International AG Baslerstrasse 42 CH-4665 Oftringen Switzerland