1. Biomedical and X-ray Physics, Department of Applied Physics, AlbaNova University Center, KTH Royal Institute of Technology, S-106 91 Stockholm, Sweden
2. Department of Physics, AlbaNova University Center, Stockholm University, S-106 91 Stockholm, Sweden
3. Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
4. Department of Chemistry, Pohang University of Science and Technology, Pohang 37673, Republic of Korea
5. European XFEL, 22869 Schenefeld, Germany
6. SwissFEL, Paul Scherrer Institute, CH-5232 Villigen, Switzerland