1. Department of Advertising and Public Relations, Michigan State University, East Lansing, MI 48824, USA
2. Centre of Geographical Studies, Institute of Geography and Spatial Planning, University of Lisbon, 1600-276 Lisbon, Portugal
3. Institute of Physiology, Lisbon School of Medicine, University of Lisbon, 1649-004 Lisbon, Portugal
4. Institute of Molecular Medicine, University of Lisbon, 1649-004 Lisbon, Portugal
5. Centre of Geographical Studies, Associate Laboratory TERRA, Institute of Geography and Spatial Planning, University of Lisbon, 1600-276 Lisbon, Portugal