1. Dipartimento di Fisica, Università Degli Studi di Milano, Via Celoria, 16, Milano, I-20133, Italy
2. European Southern Observatory, Karl-Schwarzschild-Str. 2, D-85748 Garching, Germany
3. Leiden Observatory, Leiden University, Niels Bohrweg 2, NL-2333 CA Leiden, the Netherlands
4. Max-Planck-Institut für Extraterrestrische Physik, Giessenbachstraße, D-85748 Garching, Germany
5. Department of Physics and Astronomy, University of Leicester, Leicester LE1 7RH, United Kingdom
6. INAF – Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, I-50125 Firenze, Italy
7. Excellence Cluster ‘Universe’, Boltzmann-Str. 2, D-85748 Garching, Germany
8. Institut de Planetologie et d’Astrophysique de Grenoble (IPAG), BP 53, F-38041 Grenoble Cedex 9, France
9. Departamento de Astronomía, Universidad de Chile, Camino El Observatorio 1515, Las Condes, Santiago, Chile
10. Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA
11. Department of Astronomy, California Institute of Technology, MC 249-17, Pasadena, CA 91125, USA
12. Joint ALMA Observatory (JAO), Alonso de Cordova 3107 Vitacura, Santiago de Chile, Chile
13. National Radio Astronomy Observatory, 520 Edgemont Road, Charlottesville, VA 22903-2475, USA
14. Universitats-Sternwarte München, Scheinerstraße 1, D-81679 München, Germany
15. ETH Zurich, Institute for Particle Physics and Astrophysics, Wolfgang Pauli Strasse 27, CH-Zurich, Switzerland
16. Max Planck Institute for Astronomy, Königstuhl 17, D-69117 Heidelberg, Germany
17. Department of Physics and Astronomy, Rice University, 6100 Main Street, Houston, TX, 77005, USA
18. Korea Astronomy and Space Science Institute, 776 Daedeokdae-ro, Yuseong-gu, Daejeon 34055, Korea
19. Korea University of Science and Technology, 217 Gajang-ro, Yuseong-gu, Daejeon 34113, Korea
20. University of Amsterdam, Postbus 94249, NL-1090 GE Amsterdam, the Netherlands
21. Department of Physics and Astronomy, California State University, 18111 Nordhoff Street, 91130, Northridge, CA 91330, USA
22. Institute of Astronomy, University of Cambridge, Madingley Road, CB3 0HA Cambridge, United Kingdom