1. Universidad de las Américas Puebla, Sta. Catarina Mártir, San Andrés Cholula, 72810 Puebla, Mexico
2. Instituto Nacional de Astrofísica, Óptica y Electrónica (INAOE), Aptdo. Postal 51 y 216, 72000 Puebla, Mexico
3. Instituto de Astrofísica e Ciências do Espaço, Universidade do Porto, CAUP, Rua das Estrelas, P-4150-762 Porto, Portugal
4. Department of Astronomy, University of Massachusetts, Amherst, MA 01003, USA
5. Center for Astrophysics and Space Astronomy, University of Colorado, Boulder, CO 80309, USA
6. Institute for Astronomy, University of Edinburgh, Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ, UK
7. ALMA Project Office, National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-0015, Japan
8. Institute of Astronomy, University of Tokyo, 2-21-1 Osawa, Mitaka, Tokyo 181-0015, Japan
9. European Southern Observatory, Karl Schwarzschild Strasse 2, D-85748 Garching, Germany
10. National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan
11. Department of Astronomy, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
12. The Graduate University for Advanced Studies (SOKENDAI), 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan
13. Astronomy and Space Science Department, Sejong University, Seoul 143-747, South Korea
14. Research Center for the Early Universe, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
15. National Observatory of Athens, Lofos Nymfon, Athens 11810, Greece
16. Physics Department, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
17. Centre for Astrophysics, Science and Technology Research Institute, University of Hertfordshire, Hatfield AL10 9AB, UK