1. Institute for Science and Technology in Medicine, Guy Hilton Research Centre, Keele University, Stoke-on-Trent, United Kingdom.
2. Optics and Photonics Research Group, Faculty of Engineering, The University of Nottingham, Nottingham, United Kingdom.
3. Mathematical Institute, University of Oxford, Oxford, United Kingdom.
4. Healthcare Technology Institute, Institute of Translational Medicine, University of Birmingham, Birmingham, United Kingdom.