1. Finnish Center for Astronomy with the European Southern Observatory, University of Turku, FI-20014 Turku, Finland.
2. Metsähovi Radio Observatory, Aalto University, FI-02540 Kylmälä, Finland.
3. Institutt for Fysikk, Norwegian University of Science and Technology, 7491 Trondheim, Norway.
4. Institute of Astrophysics, Foundation for Research and Technology - Hellas, GR-71110 Heraklion, Greece.
5. Department of Physics, University of Crete, GR-70013 Heraklion, Greece.
6. Center for Interdisciplinary Exploration and Research in Astrophysics, Northwestern University, Evanston, IL 60208, USA.
7. Steward Observatory, University of Arizona, Tucson, AZ 85721-0065, USA.
8. European Southern Observatory, Santiago, 19001, Chile.
9. Dark Cosmology Centre, Niels Bohr Institute, University of Copenhagen, 2200 Copenhagen, Denmark.
10. Department of Physics and Astronomy, University of Turku, FI-20014 Turku, Finland.
11. Astronomical Institute of the Czech Academy of Sciences, CZ-14131 Prague, Czech Republic.