1. Argonne National Lab. (United States)
2. Cardiff Univ. (United Kingdom)
3. Kavli Institute for Cosmological Physics (United States)
4. Univ. of California, Berkeley (United States)
5. Kavli Institute for Particle Astrophysics & Cosmology (United States)
6. Univ. of California, San Diego (United States)
7. Univ. of Colorado at Boulder (United States)
8. SLAC National Accelerator Lab. (United States)
9. McGill Univ. (Canada)
10. Univ. of Illinois at Urbana-Champaign (United States)
11. High Energy Accelerator Research Organization, KEK (Japan)
12. NIST Quantum Devices Group (United States)
13. Case Western Reserve Univ. (United States)
14. Fermi National Accelerator Lab. (United States)
15. Univ. of Toronto (Canada)
16. Univ. of Colorado (United States)
17. The Univ. of Melbourne (Australia)
18. Harvard-Smithsonian Ctr. for Astrophysics (United States)
19. The Univ. of Chicago (United States)