1. Harvard–Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA
2. Department of Physics and Astronomy, University of Utah, Salt Lake City, UT 84112, USA
3. Instituto de Física Teórica, (UAM/CSIC), Universidad Autónoma de Madrid, Cantoblanco, E-28049 Madrid, Spain
4. Leibniz-Institut für Astrophysik Potsdam (AIP), An der Sternwarte 16, D-14482 Potsdam, Germany
5. Sorbonne Universités, Institut Lagrange de Paris (ILP), 98 bis Boulevard Arago, F-75014 Paris, France
6. Laboratoire de Physique Nucléaire et de Hautes Energies, Université Pierre et Marie Curie, 4 Place Jussieu, F-75005 Paris, France
7. Lawrence Berkeley National Lab, 1 Cyclotron Rd, Berkeley CA 94720, USA
8. McWilliams Center for Cosmology, Department of Physics, Carnegie Mellon University, 5000 Forbes Ave., Pittsburgh, PA 15213, USA
9. Department of Physics, University of California, Berkeley, CA 94720, USA
10. Institute of Cosmology & Gravitation, University of Portsmouth, Dennis Sciama Building, Portsmouth PO1 3FX, UK
11. Center for Cosmology and Astroparticle Physics, Department of Physics, The Ohio State University, OH 43210, USA
12. Department of Physics and Astronomy, Sejong University, Seoul, 143-747, Korea
13. Department of Physics and Astronomy, Ohio University, Clippinger Labs, Athens, OH 45701, USA
14. Brookhaven National Laboratory, Upton, NY 11973, USA
15. Instituto de Física, Universidad Nacional Autónoma de México, Apdo. Postal 20-364, México