1. Univ. degli Studi di Firenze (Italy)
2. INAF - Osservatorio Astronomico di Trieste (Italy)
3. Univ. of Cambridge (United Kingdom)
4. INAF - Osservatorio Astrofisico di Arcetri (Italy)
5. INAF - Osservatorio Astronomico di Bologna (Italy)
6. INAF - Osservatorio Astronomico di Brera (Italy)
7. INAF - IASF Bologna (Italy)
8. Istituto Nazionale di Astrofisica (Italy)
9. Univ. de Lisboa (Portugal)
10. Univ. do Porto (Portugal)
11. Instituto de Astrofísica de Canarias (Spain)
12. Instituto de Astrofísica de Andalucía (Spain)
13. Univ. of Bern (Switzerland)
14. Lab. d'Astrophysique de Marseille (France)
15. Observatoire de Science de l'Univ. de Grenoble (France)
16. Univ. de Genève (Switzerland)
17. Univ. of Copenhagen (Denmark)
18. Federal Univ. of Rio Grande do Norte (Brazil)
19. Lab. Lagrange, Univ. Côte d'Azur, Observatoire de la Côte d'Azur (France)
20. Dark Cosmology Ctr. (Denmark)
21. Univ. Federal of Rio Grande do Norte (Brazil)
22. Leibniz-Institut für Astrophysik Potsdam (Germany)
23. UK Astronomy Technology Ctr. (United Kingdom)
24. Thüringer Landessternwarte Tautenburg (Germany)
25. Univ. of Göttingen (Germany)
26. Uppsala Univ. (Sweden)
27. Univ. Hamburg (Germany)
28. Nicolaus Copernicus Univ. (Poland)
29. Heriot Watt Univ. (United Kingdom)
30. Durham Univ. (United Kingdom)
31. Instituto Mauá de Tecnologia (Brazil)
32. Univ. Heidelberg (Germany)
33. Pontificia Univ. Católica de Chile (Chile)