1. DARK, Niels Bohr Institute, University of Copenhagen, Lyngbyvej 2, DK-2100 Copenhagen, Denmark
2. Steward Observatory, University of Arizona, 933 N. Cherry Avenue, Tucson, AZ 85721, USA
3. Institute of Astronomy and Astrophysics, Academia Sinica, PO Box 23-141, Taipei 10617, Taiwan
4. INAF-Instituto di Radioastronomia, Via Piero Gobetti 101, I-40129 Bologna, Italy
5. Department of Astronomy, The Ohio State University, 140 West 18th Avenue, Columbus, OH 43210, USA
6. Center for Cosmology and AstroParticle Physics, The Ohio State University, 191 West Woodruff Avenue, Columbus, OH 43210, USA
7. Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA