1. Instituto de Física Teórica, (UAM/CSIC), Universidad Autónoma de Madrid, Cantoblanco, E-28049 Madrid, Spain
2. Campus of International Excellence UAM+CSIC, Cantoblanco, E-28049 Madrid, Spain
3. Departamento de Física Teórica M8, Universidad Autonóma de Madrid (UAM), Cantoblanco, E-28049, Madrid, Spain
4. Instituto de Astrofísica de Andalucía (CSIC), Glorieta de la Astronomía, E-18080 Granada, Spain
5. CEA, Centre de Saclay, IRFU/SPP, F-91191 Gif-sur-Yvette, France
6. Center for Cosmology and Particle Physics, Department of Physics, New York University, New York, NY 10003, USA
7. Theoretical Astrophysics Center, Astronomy and Physics Departments, University of California, Berkeley, Berkeley CA 94720, USA
8. Astronomy Department, New Mexico State University, Las Cruces, NM-88003, USA
9. Severo Ochoa Associate Researcher at the Instituto de Física Teórica (UAM/CSIC), Cantoblanco, E-28049, Madrid, Spain
10. Center for Cosmology and AstroParticle Physics, The Ohio State University, Columbus, OH 43210, USA
11. Institute of Cosmology and Gravitation, Dennis Sciama Building, University of Portsmouth, Portsmouth PO1 3FX, UK
12. School of Physics and Astronomy, University of St Andrews, North Haugh, St Andrews KY16 9SS, UK
13. National Astronomy Observatories, Chinese Academy of Science, Beijing 100012, P.R. China