1. Department of Architecture, Geology, Environment and Construction; University of Liège; Liège Belgium
2. Agrosphere, IBG-3 (formerly ICG-4), Forschungszentrum Juelich GmbH; Juelich Germany
3. Department of Geodynamics and Geophysics; University of Bonn; Bonn Germany
4. Department of Geosciences and Natural Resource Management; University of Copenhagen; Copenhagen Denmark