1. G. W. Gray Centre for Advanced Materials
2. Department of Physics & Mathematics
3. University of Hull
4. Hull HU6 7RX
5. UK
6. medPhoton GmbH
7. 5020 Salzburg
8. Austria
9. Institute of Particle Technology
10. Friedrich-Alexander University Erlangen-Nuernberg
11. 91058 Erlangen
12. Germany
13. Interdisciplinary Center for Functional Particle Systems
14. Department of Mathematical Sciences
15. Loughborough University
16. Loughborough LE11 3TU