Author notes
1 Laboratoire AIM, CEA, Université Paris VII, IRFU/Service d'Astrophysique, Bat. 709, 91191 Gif-sur-Yvette, France.
2 Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA, United Kingdom.
3 UK ALMA Regional Centre Node, Jodrell Bank Centre for Astrophysics, School of Physics & Astronomy, University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom.
4 School of Physics and Astronomy, Cardiff University, The Parade, Cardiff CF24 3AA, United Kingdom.
5 Institut d'Astrophysique de Paris, UMR7095 CNRS, Université Pierre et Marie Curie, 98 bis Boulevard Arago, 75014 Paris, France.
6 Max Planck Institute for Extraterrestrial Physics (MPE), Giessenbachstrasse 1, 85748 Garching, Germany.
7 Sterrenkundig Observatorium, Universiteit Gent, Krijgslaan 281 S9, B-9000 Gent, Belgium.
8 Department of Physics and Astronomy, University College London, Gower St, London WC1E 6BT, United Kingdom.
9 Laboratoire d'Astrophysique de Marseille—LAM, Université d'Aix-Marseille et CNRS, UMR7326, 38 rue F. Joliot-Curie, 13388 Marseille Cedex 13, France.
10 Leiden Observatory, Leiden University, Leiden, The Netherlands.
11 Center for Astrophysics and Space Astronomy, University of Colorado, Boulder, CO 80303.
12 Division of Physics, Astronomy, and Mathematics, California Institute of Technology, Pasadena, CA 91125.
13 European Southern Observatory, Karl Schwarzschild Str. 2, 85748 Garching bei München, Germany.
14 Department of Physics, Engineering Physics, and Astronomy, Queen's University, Kingston ON K7L 3N6, Canada.
15 ESA Research and Scientific Support Department, ESTEC/SRE-SA, Keplerlaan 1, 2201 AZ Noordwijk, The Netherlands.
16 Department of Physics and Astronomy, University of California, Irvine, CA 92697.
17 Astrophysics Group, Imperial College, Blackett Laboratory, Prince Consort Road, London SW7 2AZ, United Kingdom.
18 Department of Physics and Astronomy, McMaster University, Hamilton, ON L8S 4M1 Canada.
19 Infrared Processing and Analysis Center, California Institute of Technology, Pasadena, CA 91125.
20 Istituto di Astrofisica e Planetologia Spaziali, INAF-IAPS, Via Fosso del Cavaliere 100, I-00133 Roma, Italy.
21 Astrophysics Group, Physics Department, University of the Western Cape, Private Bag X17, 7535, Bellville, Cape Town, South Africa.
22 Dipartimento di Astronomia, Università di Padova, vicolo Osservatorio, 3, 35122 Padova, Italy.
23 Observatoire Astronomique de Strasbourg, Université de Strasbourg, CNRS, UMR 7550, 11 rue de l'Université, F-67000 Strasbourg, France.
