1. Laboratoire AIM, CEA/DSM – CNRS – Université Paris Diderot, Irfu/Service d'Astrophysique, CEA Saclay, F-91191 Gif-sur-Yvette, France
2. Zentrum für Astronomie der Universität Heidelberg, Institut für theoretische Astrophysik, Albert-Ueberle-Str. 2, D-69120 Heidelberg, Germany
3. Department of Astronomy, The Ohio State University, 140 W 18th Street, Columbus, OH 43210, USA
4. Observatorio Astronómico Nacional, Alfonso XII 3, E-28014 Madrid, Spain
5. Center for Astrophysics and Space Sciences, Department of Physics, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA
6. Department of Astronomy and Laboratory for Millimeter-Wave Astronomy, University of Maryland, College Park, MD 20742, USA
7. CNRS, IRAP, 9 Avenue Colonel Roche, BP 44346, F-31028 Toulouse cedex 4, France
8. Université de Toulouse, UPS-OMP, IRAP, F-31028 Toulouse cedex 4, France
9. Instituto de Radioastronomía Milimétrica, Av. Divina Pastora 7, Núcleo Central, E-18012 Granada, Spain
10. Research School of Astronomy and Astrophysics, Australian National University, Canberra, ACT 2611, Australia
11. Department of Physics, New Mexico Institute of Mining and Technology, 801 Leroy Place, Soccoro, NM 87801, USA
12. National Radio Astronomy Observatory, 520 Edgemont Road, Charlottesville, VA 22903, USA
13. Institut de Radioastronomie Millimétrique, 300 Rue de la Piscine, F-38406 Saint Martin d'Hères, France
14. Observatoire de Paris, 61 Avenue de l'Observatoire, F-75014 Paris, France
15. Department of Physics, University of Alberta, Edmonton, AB T6G 2E1, Canada
16. Max-Planck-Institut für Astronomie, Königstuhl 17, D-69117 Heidelberg, Germany
17. Max-Planck-Institut für Extraterrestrische Physik, Giessenbachstrasse 1, D-85748 Garching, Germany