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, Austin, TX (United States)
5. ETH Zurich (Switzerland)
6. Univ. of Italian Switzerland, Lugano (Switzerland)
7. Illinois Inst. of Technology, Chicago, IL (United States)