1. Department of Biological, Geological and Environmental Sciences (DBGES) – Section of Earth Science, University of Catania, Catania, Italy
2. Department of Earth and Environmental Sciences, Lehigh University, Bethlehem, PA, USA
3. Italian Institute for Environmental Protection and Research, ISPRA (Istituto Superiore per la Protezione e la Ricerca Ambientale), Roma, Italy
4. Institute of Environmental Geology and Geoengineering of the Italian National Research Council, Monterotondo, Roma, Italy