1. Kapteyn Astronomical Institute, University of Groningen, PO Box 800, NL-9700 AV Groningen, the Netherlands
2. School of Physics and Astronomy, Cardiff University, Queen’s Building, The Parade, Cardiff CF24 3AA, Wales, UK
3. Armagh Observatory and Planetarium, College Hill, Armagh BT61 9DG, UK
4. INAF – Osservatorio Astronomico di Cagliari, Via della Scienza 5, I-09047 Selargius (CA), Italy
5. Dipartimento di Fisica, Università di Cagliari, Cittadella Universitaria, I-09042 Monserrato, Italy
6. George Mason University, Department of Physics and Astronomy, 4400 University Dr, Fairfax, VA 22030-4444, USA
7. Sterrenkundig Observatorium, Universiteit Gent, Krijgslaan 281 S9, B-9000 Gent, Belgium
8. UK ALMA Regional Centre Node, Jodrell Bank Centre for Astrophysics, School of Physics and Astronomy, The University of Manchester, Oxford Road, Manchester M13 9PL, UK
9. Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, UK
10. INAF – Osservatorio Astronomico di Capodimonte, via Moiariello 16, I-80131 Napoli, Italy
11. Australia Telescope National Facility, CSIRO Astronomy and Space Science, P.O. Box 76, 1710 Epping, NSW, Australia
12. Western Sydney University, School of Science, Locked Bag 1797, 1797 Penrith South, NSW, Australia
13. Max-Planck-Institut für Aststuhl 17, D-69117 Heidelberg, Germany
14. Sterrewacht Leiden, Leiden University, Postbus 9513, NL-2300 RA Leiden, the Netherlands
15. Max-Planck-Institut für extraterrestrische Physik, Giessenbachstraße, D-85741 Garching bei Muenchen, Germany