1. London Centre for Nanotechnology, University College London, London WC1E 6BT, UK.
2. Department of Physics, Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, UK.
3. Linac Coherent Light Source, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, CA 94025, USA.
4. ARC Centre of Excellence for Coherent X-ray Science, Department of Physics, La Trobe University, Bundoora, Victoria 3086, Australia.
5. Advanced Photon Source, Argonne, IL 60439, USA.
6. Department of Engineering Science, University of Oxford, Parks Road, Oxford OX1 3PJ, UK.
7. Research Complex at Harwell, Didcot, Oxfordshire OX11 0DE, UK.