1. Institute for X-ray Physics, Georg-August-University Göttingen, Göttingen, Germany
2. Paul Scherrer Institute, Villigen, Switzerland
3. European Synchrotron Radiation Facility, Grenoble, France
4. Department of Analytical Chemistry, Ghent University, Ghent, Belgium
5. Center for Nanoscale Microscopy and Molecular Physiology of the Brain (CNMPB), Göttingen, Germany