1. School of Informatics, Universitat Politècnica de Catalunya, Barcelona, Spain
2. Université de Lyon (Laboratoire ERIC), Lyon, France
3. Computer Science Institute, Universidad de la Republica, Montevideo, Uruguay
4. DISI – Department of Computer Science and Engineering, University of Bologna, Bologna, Italy
5. Department of Software and Computing Systems, Universitat d’Alicante, Alicante, Spain
6. Department of Information Systems, Hasso Plattner Institute, Potsdam, Germany
7. Department of Computer Science, Aalborg University, Aalborg, Denmark
8. Department of Computer Science and Engineering, Università di Bologna, Bologna, Italy
9. Department of Information Systems and Languages, Universitat d’Alicante, Alicante, Spain
10. Department of Computer Science, University of Ioannina, Ioannina, Greece
11. Department of Information Systems, Universität Münster, Münster, Germany