1. Departamento de Física Teórica, Facultad de Ciencias, Universidad Autónoma de Madrid, E-28049 Cantoblanco, Madrid, Spain
2. Instituto de Física Teorica UAM-CSIC, Universidad Autónoma de Madrid, E-28049 Cantoblanco, Madrid, Spain
3. Institute of Cosmology & Gravitation, University of Portsmouth, Dennis Sciama Building, Portsmouth PO1 3FX, UK
4. Astrophysics Research Institute, Liverpool John Moores University, 146 Brownlow Hill, Liverpool L3 5RF, UK
5. Waterloo Centre for Astrophysics, University of Waterloo, 200 University Ave W, Waterloo, ON N2L 3G1, Canada
6. Department of Physics and Astronomy, University of Waterloo, 200 University Ave W, Waterloo, ON N2L 3G1, Canada
7. IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
8. Institute of Physics, Laboratory of Astrophysics, Ecole Polytechnique Federale de Lausanne (EPFL), CH-1290 Versoix, Switzerland
9. Institute for Astronomy, University of Edinburgh, Royal Observatory, EH9 3HJ Edinburgh, UK
10. ICC, University of Barcelona, IEEC-UB, Martí i Franquès, 1, E-08028 Barcelona, Spain
11. Institut d’Estudis Espacials de Catalunya (IEEC), E-08034 Barcelona, Spain
12. Kavli Institute for Particle Astrophysics and Cosmology, Stanford University, 452 Lomita Mall, Stanford, CA 94305, USA
13. Max-Planck Institut für extraterrestrische Physik, Postfach 1312, D-85741 Garching bei München, Germany
14. Department of Physics and Astronomy, University of Utah,115 S 1400 E, Salt Lake City, UT 84112, USA
15. Sub-department of Astrophysics, Department of Physics, University of Oxford, Oxford OX1 3RH, UK
16. HEP Division, Argonne National Laboratory, Lemont, IL 60439, USA
17. Instituto de Astrofísica, Pontificia Universidad Católica de Chiless, Vicuña Mackenna 4860, Santiago, Chile
18. Perimeter Institute for Theoretical Physics, 31 Caroline St North, Waterloo, ON N2L 2Y5, Canada
19. Center for Cosmology and AstroParticle Physics, The Ohio State University, Columbus, OH 43212, USA
20. The Pennsylvania State University, University Park, PA 16802, USA
21. National Astronomy Observatories, Chinese Academy of Science, Beijing 100012, P. R. China