1. Department of Physics, University of Patras, 26500 Rio-Patras, Greece
2. Faculty of Applied Mathematics and Control Processes, Saint-Petersburg State University, Saint-Petersburg, Russia
3. TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T2A3, Canada
4. Department of Physics, University of Virginia, Charlottesville, Virginia 22904, USA
5. Institut für Kernphysik and JARA-Fame, Forschungszentrum Jülich, 52425 Jülich, Germany
6. Brookhaven National Laboratory, Upton, New York 11973, USA
7. Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
8. Department of Physics, University of Liverpool, Liverpool, United Kingdom
9. Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
10. Physics Department and INFN Section of Genoa, 16146 Genoa, Italy
11. Institute of Nuclear and Particle Physics NCSR Demokritos, GR-15310 Aghia Paraskevi Athens, Greece
12. Technical University München, Physikdepartment and Excellence-Cluster “Universe,” Garching, Germany
13. Center for Axion and Precision Physics Research, Institute for Basic Science (IBS), Daejeon 34141, South Korea
14. CEA/Saclay, DAPNIA, 91191 Gif-sur-Yvette Cedex, France
15. Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
16. University of Ferrara, INFN of Ferrara, Ferrara, Italy
17. Laboratory for Elementary-Particle Physics, Cornell University, Ithaca, New York 14853, USA
18. Physics Department, University and INFN Pisa, Pisa, Italy
19. Department of Physics, University of Massachusetts, Amherst, Massachusetts 01003, USA
20. Budker Institute of Nuclear Physics, 630090 Novosibirsk, Russia
21. Korea Research Institute of Standards and Science, Daejeon 34141, South Korea
22. RWTH Aachen University and JARA-Fame, III. Physikalisches Institut B, Physikzentrum, 52056 Aachen, Germany
23. Laboratori Nazionali di Frascati, INFN, I-00044 Frascati, Rome, Italy
24. Royal Holloway, University of London, Egham, Surrey, United Kingdom
25. Harvard College, Harvard University, Cambridge, Massachusetts 02138, USA
26. Dipartimento di Fisica dell’Univ. di Roma “Tor Vergata” and INFN Sezione di Roma Tor Vergata, Rome, Italy
27. Istanbul Technical University, Istanbul 34469, Turkey
28. Department of Physics, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, South Korea
29. Joint Institute for Nuclear Research, Dubna, Moscow region, Russia
30. Research Institute for Nuclear Problems of Belarusian State University, Minsk, Belarus
31. Indiana University Center for Spacetime Symmetries, Bloomington, Indiana 47405, USA
32. Department of Physics, Northern Illinois University, DeKalb, Illinois 60115, USA
33. Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
34. Physics Department, Korea University, Seoul 02841, South Korea