1. Leiden Observatory, Leiden University , NL-2300 RA Leiden, Netherlands
2. Departament d’Astronomia i Astrofísica , Universitat de València, C. Dr Moliner 50, E-46100 Burjassot, València, Spain
3. Unidad Asociada CSIC ‘Grupo de Astrofísica Extragaláctica y Cosmología’ (Instituto de F ísica de Cantabria – Universitat de València) , Parque Científico, C/ Catedràtic José Beltrán, 2, 46980 Paterna (València), Spain
4. Cosmic Dawn Center (DAWN), Niels Bohr Institute, University of Copenhagen , Jagtvej 128, København N, DK-2200, Denmark
5. Department of Astronomy, University of Geneva , Chemin Pegasi 51, 1290 Versoix, Switzerland
6. UCO/Lick Observatory, University of California , Santa Cruz, CA 95064, USA
7. Department of Physics, ETH Züurich , Wolfgang-Pauli-Strasse 27, 8093 Züurich, Switzerland
8. Center for Astrophysics, Harvard & Smithsonian , 60 Garden Street, Cambridge, MA 02138, USA
9. MIT Kavli Institute for Astrophysics and Space Research , 77 Massachusetts Ave., Cambridge, MA 02139, USA
10. Astronomy Department, Yale University , 52 Hillhouse Ave, New Haven, CT 06511, USA