1. Hiroshima Astrophysical Science Center, Hiroshima University , 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan
2. National Astronomical Observatory of Japan , 2-21-1, Osawa, Mitaka, Tokyo, Japan
3. Observatoire de Genéve , CH-1290 Versoix, Switzerland
4. Cosmic Dawn Center (DAWN), Niels Bohr Institute, University of Copenhagen , Jagtvej 128, København N, DK-2200, Denmark
5. Scuola Normale Superiore , Piazza dei Cavalieri 7, I-56126 Pisa, Italy
6. Leiden Observatory, Leiden University , NL-2300 RA Leiden, Netherlands
7. Steward Observatory, University of Arizona , 933 N Cherry Ave, Tucson, AZ 85721, USA
8. Departament d’Astronomia i Astrofìsica, Universitat de València , C. Dr. Moliner 50, E-46100 Burjassot, València, Spain
9. Nucleo de Astronomia, Facultad de Ingenieria y Ciencias, Universidad Diego Portales , Av. Ejercito 441, Santiago, Chile
10. International Centre for Radio Astronomy Research, University of Western Australia , 35 Stirling Hwy, Crawley 26WA 6009, Australia
11. Kapteyn Astronomical Institute, University of Groningen , NL-9700 AV Groningen, the Netherlands
12. Waseda Research Institute for Science and Engineering, Faculty of Science and Engineering, Waseda University , 3-4-1 Okubo, Shinjuku, Tokyo 169-8555, Japan
13. Departamento de Astronomia, Universidad de Chile , Camino del Observatorio 1515, Las Condes, Santiago 7591245, Chile
14. Dipartimento di Fisica, Sapienza, Universita di Roma , Piazzale Aldo Moro 5, I-00185 Roma, Italy
15. INAF/Osservatorio Astronomico di Roma , via Frascati 33, I-00078 Monte Porzio Catone, Roma, Italy
16. Sterrenkundig Observatorium, Ghent University , Krijgslaan 281 - S9, B-9000 Gent, Belgium
17. Dept. of Physics & Astronomy, University College London , Gower Street, London WC1E 6BT, UK
18. Centre for Astrophysics & Supercomputing, Swinburne University of Technology , PO Box 218, Hawthorn, VIC 3112, Australia