1. Department of Physics and Astronomy, University of California, 900 University Avenue, Riverside, CA 92521, USA
2. INAF–OATS, Via Tiepolo 11, 34143 Trieste, Italy
3. Scuola Normale Superiore, Piazza dei Cavalieri 7, I-56126 Pisa, Italy
4. INFN–National Institute for Nuclear Physics, via Valerio 2, I-34127 Trieste, Italy
5. Astronomy & Astrophysics, UC Santa Cruz, 1156 High St., Santa Cruz, CA 95064, USA
6. Department of Physics & Astronomy, University of Victoria, Finnerty Road, Victoria, British Columbia, V8P 1A1, Canada
7. Departamento de Astronoma, Universidad de Chile, Casilla 36-D, Santiago, Chile
8. Dark Cosmology Centre, Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, DK-2100 Copenhagen, Denmark
9. Department of Astronomy, The Ohio State University, 140 West 18th Avenue, Columbus, OH 43210, USA
10. Institut für Physik und Astronomie, Universität Potsdam, Karl-Liebknecht-Str. 24/25, D-14476 Potsdam, Germany