1. Department of Earth and Space Sciences, Chalmers University of Technology , Onsala Observatory, SE-439 94 Onsala , Sweden
2. Department of Physics, Graduate School of Science, Nagoya University , Nagoya, Aichi 464-8602 , Japan
3. National Astronomical Observatory of Japan , 2-21-1, Osawa, Mitaka, Tokyo 181-8588 , Japan
4. Institut de Radioastronomie Millimétrique (IRAM) , 300 Rue de la Piscine, F-38400 Saint-Martin-d’Hères , France
5. Instituto Astrofísica de Canarias (IAC) , E-38205 La Laguna, Tenerife , Spain
6. Dpto. Astrofísica, Universidad de la , E-38206 La Laguna, Tenerife , Spain
7. Institut d’Astrophysique de Paris, Sorbonne Université , UPMC Université Paris 6 and CNRS, UMR 7095, 98 bis boulevard Arago, F-75014 Paris , France
8. Instituto Nacional de Astrofísica , Óptica y Electrónica, Tonantzintla, 72000 Puebla , México
9. I. Physikalisches Institut, Universität zu Köln , Zülpicher Strasse 77, D-50937 Köln , Germany
10. Leiden Observatory, Leiden University , PO Box 9513, NL-2300 RA Leiden , the Netherlands
11. Department of Physics and Astronomy, Rutgers, the State University of New Jersey , 136 Frelinghuysen Road, Piscataway, NJ 08854-8019 , USA
12. Department of Physics and Astronomy, University of the Western Cape , Robert Sobukwe Road, Bellville 7535 , South Africa
13. Institut d’Astrophysique Spatiale (IAS), CNRS et Université Paris Sud , 13013, Orsay , France
14. UK ALMA Regional Centre Node, Jodrell Bank Centre for Astrophysics, Department of Physics and Astronomy, University of Manchester , Oxford Road, Manchester M13 9PL , UK
15. Dipartimento di Fisica e Astronomia ‘G. Galilei’, Universit’di Padova , Vicolo dell’Osservatorio 3, I-35122, Padova , Italy
16. Aix-Mar seille Univer sitè, CNRS and CNES, Laboratoire d’Astrophysique de Marseille , 38, rue Frèdèric Joliot-Curie, F-13388 Marseille , France
17. Department of Physics & Astronomy, University of California , Irvine, 4129 Reines Hall, Irvine, CA 92697 , USA
18. School of Physics and Astronomy, Cardiff University , The Parade, Cardiff CF24 3AA , UK
19. School of Physics & Astronomy, University of Nottingham , University Park, Nottingham NG7 2RD , UK
20. Institute of Astronomy, University of Cambridge , Madingley Road, Cambridge CB30HA , UK
21. Department of Astronomy, University of Maryland , College Park, MD 20742 , USA
22. European Southern Observatory , Karl Schwarzschild Strasse 2, D-85748 Garching , Germany
23. Jodrell Bank Centre for Astrophysics, School of Natural Sciences, The University of Manchester , Manchester M13 9PL , UK
24. Centre de Recherche Astrophysique de Lyon, ENS de Lyon , Université Lyon 1, CNRS, UMR5574, F-69230 Saint-Genis-Laval , France
25. Department of Astronomy, University of Cape Town , Private Bag X3, Rondebosch 7701, Cape Town , South Africa
26. INAF, Instituto di Radioastronomia-Italian ARC , Via Piero Gobetti 101, I-40129 Bologna , Italy
27. European Southern Observatory , Alonso de Córdova 3107, Vitacura, Casilla 19001, Santiago de Chile , Chile
28. Joint ALMA Observatory , Alonso de Córdova 3107, Vitacura 763-0355, Santiago de Chile , Chile
29. Ikerbasque Foundation, University of the Basque Country , DIPC Donostia, 48009 , Spain
30. National Centre for Nuclear Research , ul. Pasteura 7, PL-02-093 Warszawa , Poland
31. INAF – Osservatorio astronomico d’Abruzzo , Via Maggini SNC, I-64100, Teramo , Italy
32. The Observatories of the Carnegie Institution for Science , 813 Santa Barbara St., Pasadena, CA 91101 , USA
33. Department of Physics and Astronomy, University of California , Riverside, 900 University Ave, Riverside, CA 92521 , USA
34. School of Physical Sciences, The Open University , Milton Keynes, MK7 6AA , UK
35. National Radio Astronomy Observatory , 520 Edgemont Road, Charlottesville, VA 22903 , USA
36. Max-Planck-Institut für Radioastronomie , Auf dem Hügel 69, D-53121 Bonn , Germany