1. Department of Engineering Science, University of Oxford, Parks Road, Oxford, Oxfordshire OX1 3PJ, United Kingdom
2. Diamond Light Source Ltd., Didcot, Oxfordshire OX11 0DE, United Kingdom
3. School of Dentistry, University of Birmingham, 5 Mill Pool Way, Edgbaston, Birmingham, West Midlands B5 7EG, United Kingdom
4. Trinity College, University of Oxford, Broad St, Oxford, Oxfordshire OX1 3BH, United Kingdom