1. Argonne National Lab. (ANL), Argonne, IL (United States)
2. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
3. King Abdullah Univ. of Science and Technology, Thuwal (Saudi Arabia)
4. Univ. of Texas at Austin, Austin, TX (United States)
5. Univ. of Oxford, Oxford (United Kingdom)
6. ETH Zurich, Zurich (Switzerland)
7. Illinois Inst. of Technology, Chicago, IL (United States)