1. Deutsches Elektronen-Synchrotron DESY, Germany
2. Department of Chemistry, University of Oxford, UK
3. Institute of Physical Chemistry, Christian-Albrechts-Universität zu Kiel, Germany
4. European XFEL, Germany
5. Center for Free-Electron Laser Science CFEL, Deutsches Elektronen-Synchrotron DESY, Germany
6. Department of Physics, Lund University, Sweden
7. Radboud University, FELIX Laboratory, The Netherlands
8. Van ‘t Hoff Institute for Molecular Sciences, University of Amsterdam, The Netherlands
9. KTH Royal Institute of Technology, Sweden
10. Physics Department, University of Gothenburg, Sweden
11. Center for Ultrafast Imaging, Universität Hamburg, Germany
12. Department of Physics, Universität Hamburg, Germany
13. J.R. Macdonald Laboratory, Department of Physics, Kansas State University, KS, USA