1. Univ. of Colorado at Boulder (United States)
2. Cardiff Univ. (United Kingdom)
3. The Univ. of Chicago (United States)
4. National Institute of Standards and Technology (United States)
5. Kavli Institute for Cosmological Physics (United States)
6. Argonne National Lab. (United States)
7. McGill Univ. (Canada)
8. Univ. of California, Berkeley (United States)
9. California Institute of Technology (United States)
10. The Univ. of Arizona (United States)
11. Univ. of Michigan (United States)
12. Case Western Reserve Univ. (United States)
13. Univ. of Minnesota (United States)
14. School of the Art Institute of Chicago (United States)