1. Department of Earth Sciences, Institute of Geophysics, ETH-Zurich, Sonneggstrasse 5, CH-8092 Zurich, Switzerland
2. Department of Biomaterials, Max Planck Institute of Colloids and Interfaces, Science Park Golm, D-14424 Potsdam, Germany
3. Department of Earth and Environmental Sciences, University of Pannonia, Egyetem u. 10, H-8200 Veszprém, Hungary
4. Department Biologie I, LMU Munich, Großhaderner Str. 2, D-82152 Martinsried, Germany