1. Deutsches Elektronen-Synchrotron (DESY), Zeuthen (Germany)
2. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); Old Dominion Univ., Norfolk, VA (United States)
3. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States); Institute for Artificial Intelligence and Fundamental Interactions (IAIFI) Cambridge, MA (United States)
4. George Washington Univ., Washington, DC (United States); Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
5. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
6. Univ. of Bern (Switzerland); National Chiao Tung Univ., Hsinchu (Taiwan); European Organization for Nuclear Research (CERN), Geneva (Switzerland)
7. Univ. of Wuppertal (Germany)
8. York Univ., Toronto, ON (Canada)
9. Univ. of Ljubljana (Slovenia); Jozef Stefan Inst. (IJS), Ljubljana (Slovenia)
10. Trinity College Dublin (Ireland)
11. Univ. of Bonn (Germany); Tbilisi State University (Georgia)
12. Univ. of Washington, Seattle, WA (United States)
13. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); Indiana Univ., Bloomington, IN (United States)
14. Univ. of Cambridge (United Kingdom)
15. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
16. Goethe Univ., Frankfurt (Germany); Helmholtz Research Academy Hesse for FAIR, Frankfurt (Germany)