1. Department of Physics and Astronomy, University of British Columbia, 6225 Agricultural Road, Vancouver V6T 1Z1, Canada
2. Herzberg Astronomy and Astrophysics, National Research Council, 5071 West Saanich Road, Victoria V9E 2E7, Canada
3. Department of Physics and Atmospheric Science, Dalhousie University, 6310 Coburg Road, Halifax B3H 4R2, Canada
4. Department of Physics, Centre for Extragalactic Astronomy, Durham University, South Road, Durham DH1 3LE, UK
5. Cahill Center for Astronomy and Astrophysics, California Institute of Technology, MS 249-17, Pasadena, CA 91125, USA
6. Institut de Radio Astronomie Millimétrique, Domaine Universitaire, 300 Rue de la Piscine, Saint Martin d’Hères F-38406, France
7. Department of Physics and Astronomy, University of Victoria, 3800 Finnerty Road, Victoria V8P 1A1, Canada
8. European Southern Observatory, Alonso de Córdova 3107, Santiago, Casilla 19001, Chile
9. Argelander-Institute für Astronomie, Rheinische Friedrich-Wilhelms Universität Bonn, Auf dem Hügel 71, Bonn D-53121, Germany
10. Purple Mountain Observatory, Chinese Academy of Sciences, 8 Yuanhua, Nanjing 2100034, China
11. Department of Physics and Astronomy, McMaster University, 1280 Main Street West, Hamilton L8S 4M1, Canada
12. National Astronomical Observatory of Japan, Osawa 2-21-1, Mitaka 181-8588, Japan
13. Graduate University for Advanced Studies (SOKENDAI), Osawa 2-21-1, Mitaka 181-8588, Japan
14. Carnegie Observatories, 813 Santa Barbara Street, Pasadena, CA 91101, USA
15. Department of Physics and Astronomy, Franklin & Marshall College, 415 Harrisburg Pike, Lancaster, PA 17603, USA