1. George Washington University, Washington, DC, USA
2. University Institute of Lisbon (ISCTE-IUL), Portugal University of Memphis, Memphis, TN, USA
3. University of Beira Interior, Covilhã, Portugal
4. University of Oviedo, Oviedo, Spain
5. National Taipei University, Taipei City, Taiwan
6. Technical University of Crete, Chania, Greece