1. MBLEM, Department of Engineering Science, University of Oxford, Parks Road, Oxford, Oxfordshire OX1 3PJ, U.K.
2. TESCAN-UK Ltd., Wellbrook Court, Girton, Cambridge CB3 0NA, U.K.
3. Diamond Light Source Ltd., Didcot, Oxfordshire OX11 0DE, U.K.
4. School of Dentistry, University of Birmingham, 5 Mill Pool Way, Edgbaston, Birmingham, West Midlands B5 7EG, U.K.
5. Research Complex at Harwell, Harwell Campus, Didcot OX11 0FA, U.K.